diff --git a/docs/package.json b/docs/package.json
index 636fd63c55..0690b95b6a 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -8,7 +8,7 @@
     "build": "astro build",
     "preview": "astro preview",
     "lint": "run-p --aggregate-output lint:linkcheck",
-    "lint:a11y": "start-test 'yarn dev --silent' 3000 'yarn lint:a11y:local'",
+    "lint:a11y": "start-test 'yarn build && yarn preview' 3000 'yarn lint:a11y:local'",
     "lint:a11y:local": "pa11y-ci --sitemap 'http://localhost:3000/sitemap.xml' --sitemap-find 'https://docs.astro.build' --sitemap-replace 'http://localhost:3000'",
     "lint:a11y:remote": "pa11y-ci --sitemap 'https://docs.astro.build/sitemap.xml'",
     "lint:linkcheck": "start-test 'yarn dev --silent' 3000  'yarn lint:linkcheck:local'",
@@ -19,6 +19,7 @@
     "astro": "^0.22.0",
     "broken-link-checker": "^0.7.8",
     "npm-run-all": "^4.1.5",
+    "pa11y-ci": "^3.0.1",
     "prettier": "^2.4.1",
     "start-server-and-test": "^1.12.6"
   },
diff --git a/yarn.lock b/yarn.lock
index a17b6aaf6b..fa19fcc6ea 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1973,6 +1973,13 @@
   resolved "https://registry.yarnpkg.com/@types/yargs-parser/-/yargs-parser-20.2.1.tgz#3b9ce2489919d9e4fea439b76916abc34b2df129"
   integrity sha512-7tFImggNeNBVMsn0vLrpn1H1uPrUBdnARPTpZoitY37ZrdJREzf7I16tMrlK3hen349gr1NYh8CmZQa7CTG6Aw==
 
+"@types/yauzl@^2.9.1":
+  version "2.9.2"
+  resolved "https://registry.yarnpkg.com/@types/yauzl/-/yauzl-2.9.2.tgz#c48e5d56aff1444409e39fa164b0b4d4552a7b7a"
+  integrity sha512-8uALY5LTvSuHgloDVUvWP3pIauILm+8/0pDMokuDYIoNsOkSwd5AiHBTSEJjKTDcZr5z8UpgOWZkxBF4iJftoA==
+  dependencies:
+    "@types/node" "*"
+
 "@typescript-eslint/eslint-plugin@^5.0.0":
   version "5.9.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-5.9.0.tgz#382182d5cb062f52aac54434cfc47c28898c8006"
@@ -2464,6 +2471,13 @@ array-iterate@^1.0.0:
   resolved "https://registry.yarnpkg.com/array-iterate/-/array-iterate-1.1.4.tgz#add1522e9dd9749bb41152d08b845bd08d6af8b7"
   integrity sha512-sNRaPGh9nnmdC8Zf+pT3UqP8rnWj5Hf9wiFGsX3wUQ2yVSIhO2ShFwCoceIPpB41QF6i2OEmrHmCo36xronCVA==
 
+array-union@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39"
+  integrity sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=
+  dependencies:
+    array-uniq "^1.0.1"
+
 array-union@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-2.1.0.tgz#b798420adbeb1de828d84acd8a2e23d3efe85e8d"
@@ -2474,6 +2488,11 @@ array-union@^3.0.1:
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-3.0.1.tgz#da52630d327f8b88cfbfb57728e2af5cd9b6b975"
   integrity sha512-1OvF9IbWwaeiM9VhzYXVQacMibxpXOMYVNIvMtKRyX9SImBXpKcFr8XvFDeEslCyuH/t6KRt7HEO94AlP8Iatw==
 
+array-uniq@^1.0.1:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/array-uniq/-/array-uniq-1.0.3.tgz#af6ac877a25cc7f74e058894753858dfdb24fdb6"
+  integrity sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=
+
 arrify@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/arrify/-/arrify-1.0.1.tgz#898508da2226f380df904728456849c1501a4b0d"
@@ -2511,6 +2530,13 @@ async@0.9.x:
   resolved "https://registry.yarnpkg.com/async/-/async-0.9.2.tgz#aea74d5e61c1f899613bf64bda66d4c78f2fd17d"
   integrity sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0=
 
+async@~2.6.3:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.3.tgz#d72625e2344a3656e3a3ad4fa749fa83299d82ff"
+  integrity sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==
+  dependencies:
+    lodash "^4.17.14"
+
 at-least-node@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/at-least-node/-/at-least-node-1.0.0.tgz#602cd4b46e844ad4effc92a8011a3c46e0238dc2"
@@ -2533,6 +2559,11 @@ available-typed-arrays@^1.0.5:
   resolved "https://registry.yarnpkg.com/available-typed-arrays/-/available-typed-arrays-1.0.5.tgz#92f95616501069d07d10edb2fc37d3e1c65123b7"
   integrity sha512-DMD0KiN46eipeziST1LPP/STfDU0sufISXmjSgvVsoU2tqxctQeASejWcfNtxYKqETM1UxQ8sp2OrSBWpHY6sw==
 
+axe-core@^4.0.2:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/axe-core/-/axe-core-4.3.5.tgz#78d6911ba317a8262bfee292aeafcc1e04b49cc5"
+  integrity sha512-WKTW1+xAzhMS5dJsxWkliixlO/PqC4VhmO9T4juNYcaTg9jzWiJsou6m5pxWYGfigWbwzJWeFY6z47a+4neRXA==
+
 axios@^0.21.1:
   version "0.21.4"
   resolved "https://registry.yarnpkg.com/axios/-/axios-0.21.4.tgz#c67b90dc0568e5c1cf2b0b858c43ba28e2eda575"
@@ -2631,6 +2662,16 @@ better-path-resolve@1.0.0:
   dependencies:
     is-windows "^1.0.0"
 
+bfj@~7.0.2:
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/bfj/-/bfj-7.0.2.tgz#1988ce76f3add9ac2913fd8ba47aad9e651bfbb2"
+  integrity sha512-+e/UqUzwmzJamNF50tBV6tZPTORow7gQ96iFow+8b562OdMpEK0BcJEq2OSPEDmAbSMBQ7PKZ87ubFkgxpYWgw==
+  dependencies:
+    bluebird "^3.5.5"
+    check-types "^11.1.1"
+    hoopy "^0.1.4"
+    tryer "^1.0.1"
+
 bhttp@^1.2.1:
   version "1.2.8"
   resolved "https://registry.yarnpkg.com/bhttp/-/bhttp-1.2.8.tgz#8172ef69f16239bd77c30fa67f72c89737af24b2"
@@ -2665,7 +2706,7 @@ bl@^4.0.3:
     inherits "^2.0.4"
     readable-stream "^3.4.0"
 
-bluebird@3.7.2:
+bluebird@3.7.2, bluebird@^3.5.5:
   version "3.7.2"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
   integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
@@ -2759,7 +2800,7 @@ browserslist@^4.17.5, browserslist@^4.19.1:
     node-releases "^2.0.1"
     picocolors "^1.0.0"
 
-buffer-crc32@^0.2.5:
+buffer-crc32@^0.2.5, buffer-crc32@~0.2.3:
   version "0.2.13"
   resolved "https://registry.yarnpkg.com/buffer-crc32/-/buffer-crc32-0.2.13.tgz#0d333e3f00eac50aa1454abd30ef8c2a5d9a7242"
   integrity sha1-DTM+PwDqxQqhRUq9MO+MKl2ackI=
@@ -2769,7 +2810,7 @@ buffer-from@^1.0.0:
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.2.tgz#2b146a6fd72e80b4f55d255f35ed59a3a9a41bd5"
   integrity sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==
 
-buffer@^5.5.0:
+buffer@^5.2.1, buffer@^5.5.0:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.7.1.tgz#ba62e7c13133053582197160851a8f648e99eed0"
   integrity sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==
@@ -2973,6 +3014,11 @@ check-more-types@2.24.0:
   resolved "https://registry.yarnpkg.com/check-more-types/-/check-more-types-2.24.0.tgz#1420ffb10fd444dcfc79b43891bbfffd32a84600"
   integrity sha1-FCD/sQ/URNz8ebQ4kbv//TKoRgA=
 
+check-types@^11.1.1:
+  version "11.1.2"
+  resolved "https://registry.yarnpkg.com/check-types/-/check-types-11.1.2.tgz#86a7c12bf5539f6324eb0e70ca8896c0e38f3e2f"
+  integrity sha512-tzWzvgePgLORb9/3a0YenggReLKAIb2owL03H2Xdoe5pKcUyWRSEQ8xfCar8t2SIAuEDwtmx2da1YB52YuHQMQ==
+
 cheerio-select@^1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/cheerio-select/-/cheerio-select-1.5.0.tgz#faf3daeb31b17c5e1a9dabcee288aaf8aafa5823"
@@ -2984,7 +3030,7 @@ cheerio-select@^1.5.0:
     domhandler "^4.2.0"
     domutils "^2.7.0"
 
-cheerio@^1.0.0-rc.10:
+cheerio@^1.0.0-rc.10, cheerio@~1.0.0-rc.10:
   version "1.0.0-rc.10"
   resolved "https://registry.yarnpkg.com/cheerio/-/cheerio-1.0.0-rc.10.tgz#2ba3dcdfcc26e7956fc1f440e61d51c643379f3e"
   integrity sha512-g0J0q/O6mW8z5zxQ3A8E8J1hUgp4SMOvEoW/x84OwyHKe/Zccz83PVT4y5Crcr530FV6NgmKI1qvGTKVl9XXVw==
@@ -3151,6 +3197,16 @@ commander@^2.20.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
 
+commander@~6.2.1:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-6.2.1.tgz#0792eb682dfbc325999bb2b84fddddba110ac73c"
+  integrity sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==
+
+commander@~8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-8.0.0.tgz#1da2139548caef59bd23e66d18908dfb54b02258"
+  integrity sha512-Xvf85aAtu6v22+E5hfVoLHqyul/jyxh91zvqk/ioJTQuJR7Z78n7H558vMPKanPSRgIEeZemT92I2g9Y8LPbSQ==
+
 common-ancestor-path@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/common-ancestor-path/-/common-ancestor-path-1.0.1.tgz#4f7d2d1394d91b7abdf51871c62f71eadb0182a7"
@@ -3558,6 +3614,11 @@ dev-null@^0.1.1:
   resolved "https://registry.yarnpkg.com/dev-null/-/dev-null-0.1.1.tgz#5a205ce3c2b2ef77b6238d6ba179eb74c6a0e818"
   integrity sha1-WiBc48Ky73e2I41roXnrdMag6Bg=
 
+devtools-protocol@0.0.869402:
+  version "0.0.869402"
+  resolved "https://registry.yarnpkg.com/devtools-protocol/-/devtools-protocol-0.0.869402.tgz#03ade701761742e43ae4de5dc188bcd80f156d8d"
+  integrity sha512-VvlVYY+VDJe639yHs5PHISzdWTLL3Aw8rO4cvUtwvoxFd6FHbE4OpHHcde52M6096uYYazAmd4l0o5VuFRO2WA==
+
 didyoumean@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/didyoumean/-/didyoumean-1.2.2.tgz#989346ffe9e839b4555ecf5666edea0d3e8ad037"
@@ -3701,6 +3762,11 @@ entities@^3.0.1:
   resolved "https://registry.yarnpkg.com/entities/-/entities-3.0.1.tgz#2b887ca62585e96db3903482d336c1006c3001d4"
   integrity sha512-WiyBqoomrwMdFG1e0kqvASYfnlb0lp8M5o5Fw2OFq1hNZxxcNk8Ik0Xm7LxzBhuidnZB/UtBqVCgUz3kBOP51Q==
 
+envinfo@~7.8.1:
+  version "7.8.1"
+  resolved "https://registry.yarnpkg.com/envinfo/-/envinfo-7.8.1.tgz#06377e3e5f4d379fea7ac592d5ad8927e0c4d475"
+  integrity sha512-/o+BXHmB7ocbHEAs6F2EnG0ogybVVUdkRunTT2glZU9XAaGmhqskrvKwqXuDfNjEO0LZKWdejEEpnq8aM0tOaw==
+
 eol@^0.9.1:
   version "0.9.1"
   resolved "https://registry.yarnpkg.com/eol/-/eol-0.9.1.tgz#f701912f504074be35c6117a5c4ade49cd547acd"
@@ -4411,6 +4477,17 @@ external-editor@^3.1.0:
     iconv-lite "^0.4.24"
     tmp "^0.0.33"
 
+extract-zip@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/extract-zip/-/extract-zip-2.0.1.tgz#663dca56fe46df890d5f131ef4a06d22bb8ba13a"
+  integrity sha512-GDhU9ntwuKyGXdZBUgTIe+vXnWj0fppUEtMDL0+idd5Sta8TGpHssn/eusA9mrPr9qNDym6SxAYZjNvCn/9RBg==
+  dependencies:
+    debug "^4.1.1"
+    get-stream "^5.1.0"
+    yauzl "^2.10.0"
+  optionalDependencies:
+    "@types/yauzl" "^2.9.1"
+
 fast-deep-equal@^3.1.1, fast-deep-equal@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
@@ -4456,6 +4533,13 @@ fastq@^1.6.0:
   dependencies:
     reusify "^1.0.4"
 
+fd-slicer@~1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/fd-slicer/-/fd-slicer-1.1.0.tgz#25c7c89cb1f9077f8891bbe61d8f390eae256f1e"
+  integrity sha1-JcfInLH5B3+IkbvmHY85Dq4lbx4=
+  dependencies:
+    pend "~1.2.0"
+
 fetch-blob@^3.1.2:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/fetch-blob/-/fetch-blob-3.1.3.tgz#a7dca4855e39d3e3c5a1da62d4ee335c37d26012"
@@ -4475,6 +4559,11 @@ file-uri-to-path@2:
   resolved "https://registry.yarnpkg.com/file-uri-to-path/-/file-uri-to-path-2.0.0.tgz#7b415aeba227d575851e0a5b0c640d7656403fba"
   integrity sha512-hjPFI8oE/2iQPVe4gbrJ73Pp+Xfub2+WI2LlXDbsaJBwT5wuMh35WNWVYYTpnz895shtwfyutMFLFywpQAFdLg==
 
+file-url@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/file-url/-/file-url-3.0.0.tgz#247a586a746ce9f7a8ed05560290968afc262a77"
+  integrity sha512-g872QGsHexznxkIAdK8UiZRe7SkE6kvylShU4Nsj8NvfvZag7S0QuQ4IgvPDkk75HxgjIVDwycFTDAgIiO4nDA==
+
 filelist@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/filelist/-/filelist-1.0.2.tgz#80202f21462d4d1c2e214119b1807c1bc0380e5b"
@@ -4791,7 +4880,7 @@ glob@7.1.7:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.1.3, glob@^7.1.6:
+glob@^7.0.3, glob@^7.1.3, glob@^7.1.6:
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.2.0.tgz#d15535af7732e02e948f4c41628bd910293f6023"
   integrity sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==
@@ -4844,6 +4933,17 @@ globby@^12.0.2:
     merge2 "^1.4.1"
     slash "^4.0.0"
 
+globby@~6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-6.1.0.tgz#f5a6d70e8395e21c858fb0489d64df02424d506c"
+  integrity sha1-9abXDoOV4hyFj7BInWTfAkJNUGw=
+  dependencies:
+    array-union "^1.0.1"
+    glob "^7.0.3"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
 globrex@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/globrex/-/globrex-0.1.2.tgz#dd5d9ec826232730cd6793a5e33a9302985e6098"
@@ -5095,6 +5195,19 @@ he@1.2.0:
   resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
   integrity sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==
 
+hogan.js@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/hogan.js/-/hogan.js-3.0.2.tgz#4cd9e1abd4294146e7679e41d7898732b02c7bfd"
+  integrity sha1-TNnhq9QpQUbnZ55B14mHMrAse/0=
+  dependencies:
+    mkdirp "0.3.0"
+    nopt "1.0.10"
+
+hoopy@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/hoopy/-/hoopy-0.1.4.tgz#609207d661100033a9a9402ad3dea677381c1b1d"
+  integrity sha512-HRcs+2mr52W0K+x8RzcLzuPPmVIKMSv97RGHy0Ea9y/mpcaK+xTrjICA04KAHi4GRzxliNqNJEFYWHghy3rSfQ==
+
 hosted-git-info@^2.1.4:
   version "2.8.9"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.9.tgz#dffc0bf9a21c02209090f2aa69429e1414daf3f9"
@@ -5110,6 +5223,11 @@ html-void-elements@^2.0.0:
   resolved "https://registry.yarnpkg.com/html-void-elements/-/html-void-elements-2.0.1.tgz#29459b8b05c200b6c5ee98743c41b979d577549f"
   integrity sha512-0quDb7s97CfemeJAnW9wC0hw78MtW7NU3hqtCD75g2vFlDLt36llsYD7uB7SUzojLMP24N5IatXf7ylGXiGG9A==
 
+html_codesniffer@^2.5.1:
+  version "2.5.1"
+  resolved "https://registry.yarnpkg.com/html_codesniffer/-/html_codesniffer-2.5.1.tgz#d76d124b8f5cd0e58b3c1b142fd095a40573ea28"
+  integrity sha512-vcz0yAaX/OaV6sdNHuT9alBOKkSxYb8h5Yq26dUqgi7XmCgGUSa7U9PiY1PBXQFMjKv1wVPs5/QzHlGuxPDUGg==
+
 htmlparser2@^6.1.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-6.1.0.tgz#c4d762b6c3371a05dbe65e94ae43a9f845fb8fb7"
@@ -5597,6 +5715,11 @@ is-windows@^1.0.0:
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
   integrity sha512-eXK1UInq2bPmjyX6e3VHIzMLobc4J94i4AWn+Hpq3OU5KkrRC96OAcR3PRJ/pGu6m8TRnBHP9dkXQVsT/COVIA==
 
+is@^3.2.1:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/is/-/is-3.3.0.tgz#61cff6dd3c4193db94a3d62582072b44e5645d79"
+  integrity sha512-nW24QBoPcFGGHJGUwnfpI7Yc5CdqWNdsyHQszVE/z2pKHXzh7FZ5GWhJqSyaQ9wMkQnsTx+kAI8bHlCX4tKdbg==
+
 isarray@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
@@ -5772,7 +5895,7 @@ kleur@^3.0.3:
   resolved "https://registry.yarnpkg.com/kleur/-/kleur-3.0.3.tgz#a79c9ecc86ee1ce3fa6206d1216c501f147fc07e"
   integrity sha512-eTIzlVOSUR+JxdDFepEYcBMtZ9Qqdef+rnzWdRZuMbOywu5tO2w2N7rqjoANZ5k9vywhL6Br1VRjUIgTQx4E8w==
 
-kleur@^4.0.3, kleur@^4.1.1, kleur@^4.1.4:
+kleur@^4.0.3, kleur@^4.1.1, kleur@^4.1.4, kleur@~4.1.4:
   version "4.1.4"
   resolved "https://registry.yarnpkg.com/kleur/-/kleur-4.1.4.tgz#8c202987d7e577766d039a8cd461934c01cda04d"
   integrity sha512-8QADVssbrFjivHWQU7KkMgptGTl6WAcSdlbBPY4uNF+mWr6DGcKrvY2w4FQJoXch7+fKMjj0dRrL75vk3k23OA==
@@ -6000,7 +6123,7 @@ lodash.startcase@^4.4.0:
   resolved "https://registry.yarnpkg.com/lodash.startcase/-/lodash.startcase-4.4.0.tgz#9436e34ed26093ed7ffae1936144350915d9add8"
   integrity sha1-lDbjTtJgk+1/+uGTYUQ1CRXZrdg=
 
-lodash@^4.17.20, lodash@^4.17.21:
+lodash@^4.17.14, lodash@^4.17.20, lodash@^4.17.21, lodash@~4.17.21:
   version "4.17.21"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
@@ -6691,6 +6814,11 @@ mkdirp-classic@^0.5.2, mkdirp-classic@^0.5.3:
   resolved "https://registry.yarnpkg.com/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz#fa10c9115cc6d8865be221ba47ee9bed78601113"
   integrity sha512-gKLcREMhtuZRwRAfqP3RFW+TK4JqApVBtOIftVgjuABpAtpxhPGaDcfvbhNvD0B8iD1oUr/txX35NjcaY6Ns/A==
 
+mkdirp@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.3.0.tgz#1bbf5ab1ba827af23575143490426455f481fe1e"
+  integrity sha1-G79asbqCevI1dRQ0kEJkVfSB/h4=
+
 mkdirp@^0.5.1:
   version "0.5.5"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
@@ -6836,7 +6964,7 @@ node-fetch@*, node-fetch@^3.0.0:
     fetch-blob "^3.1.2"
     formdata-polyfill "^4.0.10"
 
-node-fetch@^2.5.0, node-fetch@^2.6.0, node-fetch@^2.6.1:
+node-fetch@^2.5.0, node-fetch@^2.6.0, node-fetch@^2.6.1, node-fetch@~2.6.1:
   version "2.6.6"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.6.tgz#1751a7c01834e8e1697758732e9efb6eeadfaf89"
   integrity sha512-Z8/6vRlTUChSdIgMa51jxQ4lrw/Jy5SOW10ObaA47/RElsAN2c5Pn8bTgFGWn/ibwzXTE8qwr1Yzx28vsecXEA==
@@ -6848,6 +6976,21 @@ node-releases@^2.0.1:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.1.tgz#3d1d395f204f1f2f29a54358b9fb678765ad2fc5"
   integrity sha512-CqyzN6z7Q6aMeF/ktcMVTzhAHCEpf8SOarwpzpf8pNBY2k5/oM34UHldUwp8VKI7uxct2HxSRdJjBaZeESzcxA==
 
+node.extend@~2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/node.extend/-/node.extend-2.0.2.tgz#b4404525494acc99740f3703c496b7d5182cc6cc"
+  integrity sha512-pDT4Dchl94/+kkgdwyS2PauDFjZG0Hk0IcHIB+LkW27HLDtdoeMxHTxZh39DYbPP8UflWXWj9JcdDozF+YDOpQ==
+  dependencies:
+    has "^1.0.3"
+    is "^3.2.1"
+
+nopt@1.0.10:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/nopt/-/nopt-1.0.10.tgz#6ddd21bd2a31417b92727dd585f8a6f37608ebee"
+  integrity sha1-bd0hvSoxQXuScn3Vhfim83YI6+4=
+  dependencies:
+    abbrev "1"
+
 nopt@^3.0.1:
   version "3.0.6"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-3.0.6.tgz#c6465dbf08abcd4db359317f79ac68a646b28ff9"
@@ -6957,7 +7100,7 @@ object-assign@^2.0.0:
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-2.1.1.tgz#43c36e5d569ff8e4816c4efa8be02d26967c18aa"
   integrity sha1-Q8NuXVaf+OSBbE76i+AtJpZ8GKo=
 
-object-assign@^4.1.0, object-assign@^4.1.1:
+object-assign@^4.0.1, object-assign@^4.1.0, object-assign@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
   integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
@@ -7136,11 +7279,50 @@ p-map@^4.0.0:
   dependencies:
     aggregate-error "^3.0.0"
 
+p-timeout@~4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/p-timeout/-/p-timeout-4.1.0.tgz#788253c0452ab0ffecf18a62dff94ff1bd09ca0a"
+  integrity sha512-+/wmHtzJuWii1sXn3HCuH/FTwGhrp4tmJTxSKJbfS+vkipci6osxXM5mY0jUiRzWKMTgUT8l7HFbeSwZAynqHw==
+
 p-try@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.2.0.tgz#cb2868540e313d61de58fafbe35ce9004d5540e6"
   integrity sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==
 
+pa11y-ci@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/pa11y-ci/-/pa11y-ci-3.0.1.tgz#8de1fbf96544d5af66c53a832349b3a9e51b9f7a"
+  integrity sha512-DUtEIhEG3Ofds7qRuplq0DdCb9doILRlzcRctFNzo4QUNmVy4iZfM3u51A9cqoPo2irCJZoo5BzfiFrcriY2IQ==
+  dependencies:
+    async "~2.6.3"
+    cheerio "~1.0.0-rc.10"
+    commander "~6.2.1"
+    globby "~6.1.0"
+    kleur "~4.1.4"
+    lodash "~4.17.21"
+    node-fetch "~2.6.1"
+    pa11y "~6.1.0"
+    protocolify "~3.0.0"
+    puppeteer "~9.1.1"
+    wordwrap "~1.0.0"
+
+pa11y@~6.1.0:
+  version "6.1.1"
+  resolved "https://registry.yarnpkg.com/pa11y/-/pa11y-6.1.1.tgz#b204ecd172a664de4ade56f31a58fe5b3342800e"
+  integrity sha512-2NzqA3D9CUlDWj8WuOI4fM2P0qM1d/IUxsRRpzCOfDT5eMR1oEgmUwW2TAk+f90ff/GVck0BewdYT4et4BANew==
+  dependencies:
+    axe-core "^4.0.2"
+    bfj "~7.0.2"
+    commander "~8.0.0"
+    envinfo "~7.8.1"
+    hogan.js "^3.0.2"
+    html_codesniffer "^2.5.1"
+    kleur "~4.1.4"
+    node.extend "~2.0.2"
+    p-timeout "~4.1.0"
+    puppeteer "~9.1.1"
+    semver "~7.3.5"
+
 pac-proxy-agent@^5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/pac-proxy-agent/-/pac-proxy-agent-5.0.0.tgz#b718f76475a6a5415c2efbe256c1c971c84f635e"
@@ -7321,6 +7503,11 @@ pause-stream@0.0.11:
   dependencies:
     through "~2.3"
 
+pend@~1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/pend/-/pend-1.2.0.tgz#7a57eb550a6783f9115331fcf4663d5c8e007a50"
+  integrity sha1-elfrVQpng/kRUzH89GY9XI4AelA=
+
 picocolors@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.0.0.tgz#cb5bdc74ff3f51892236eaf79d68bc44564ab81c"
@@ -7336,6 +7523,11 @@ pidtree@^0.3.0:
   resolved "https://registry.yarnpkg.com/pidtree/-/pidtree-0.3.1.tgz#ef09ac2cc0533df1f3250ccf2c4d366b0d12114a"
   integrity sha512-qQbW94hLHEqCg7nhby4yRC7G2+jYHY4Rguc2bjw7Uug4GIJuu1tvf2uHaZv5Q8zdt+WKJ6qK1FOI6amaWUo5FA==
 
+pify@^2.0.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
+  integrity sha1-7RQaasBDqEnqWISY59yosVMw6Qw=
+
 pify@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
@@ -7346,6 +7538,18 @@ pify@^4.0.1:
   resolved "https://registry.yarnpkg.com/pify/-/pify-4.0.1.tgz#4b2cd25c50d598735c50292224fd8c6df41e3231"
   integrity sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==
 
+pinkie-promise@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
+  integrity sha1-ITXW36ejWMBprJsXh3YogihFD/o=
+  dependencies:
+    pinkie "^2.0.0"
+
+pinkie@^2.0.0:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"
+  integrity sha1-clVrgM+g1IqXToDnckjoDtT3+HA=
+
 pkg-dir@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-4.2.0.tgz#f099133df7ede422e81d1d8448270eeb3e4261f3"
@@ -7455,6 +7659,11 @@ prelude-ls@~1.1.2:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
   integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
+prepend-http@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-3.0.1.tgz#3e724d58fd5867465b300bb9615009fa2f8ee3b6"
+  integrity sha512-BLxfZh+m6UiAiCPZFJ4+vYoL7NrRs5XgCTRrjseATAggXhdZKKxn+JUNmuVYWY23bDHgaEHodxw8mnmtVEDtHw==
+
 prettier-linter-helpers@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/prettier-linter-helpers/-/prettier-linter-helpers-1.0.0.tgz#d23d41fe1375646de2d0104d3454a3008802cf7b"
@@ -7492,7 +7701,7 @@ process-nextick-args@~2.0.0:
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.1.tgz#7820d9b16120cc55ca9ae7792680ae7dba6d7fe2"
   integrity sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==
 
-progress@^2.0.0:
+progress@^2.0.0, progress@^2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.3.tgz#7e8cf8d8f5b8f239c1bc68beb4eb78567d572ef8"
   integrity sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==
@@ -7510,6 +7719,14 @@ property-information@^6.0.0:
   resolved "https://registry.yarnpkg.com/property-information/-/property-information-6.1.1.tgz#5ca85510a3019726cb9afed4197b7b8ac5926a22"
   integrity sha512-hrzC564QIl0r0vy4l6MvRLhafmUowhO/O3KgVSoXIbbA2Sz4j8HGpJc6T2cubRVwMwpdiG/vKGfhT4IixmKN9w==
 
+protocolify@~3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/protocolify/-/protocolify-3.0.0.tgz#addf3f90b4f2b86b65cdaf260a761e2bf556854e"
+  integrity sha512-PuvDJOkKJMVQx8jSNf8E5g0bJw/UTKm30mTjFHg4N30c8sefgA5Qr/f8INKqYBKfvP/MUSJrj+z1Smjbq4/3rQ==
+  dependencies:
+    file-url "^3.0.0"
+    prepend-http "^3.0.0"
+
 proxy-agent@^5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/proxy-agent/-/proxy-agent-5.0.0.tgz#d31405c10d6e8431fde96cba7a0c027ce01d633b"
@@ -7524,7 +7741,7 @@ proxy-agent@^5.0.0:
     proxy-from-env "^1.0.0"
     socks-proxy-agent "^5.0.0"
 
-proxy-from-env@^1.0.0:
+proxy-from-env@^1.0.0, proxy-from-env@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/proxy-from-env/-/proxy-from-env-1.1.0.tgz#e102f16ca355424865755d2c9e8ea4f24d58c3e2"
   integrity sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==
@@ -7564,6 +7781,24 @@ punycode@^2.1.0, punycode@^2.1.1:
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.1.tgz#b58b010ac40c22c5657616c8d2c2c02c7bf479ec"
   integrity sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==
 
+puppeteer@~9.1.1:
+  version "9.1.1"
+  resolved "https://registry.yarnpkg.com/puppeteer/-/puppeteer-9.1.1.tgz#f74b7facf86887efd6c6b9fabb7baae6fdce012c"
+  integrity sha512-W+nOulP2tYd/ZG99WuZC/I5ljjQQ7EUw/jQGcIb9eu8mDlZxNY2SgcJXTLG9h5gRvqA3uJOe4hZXYsd3EqioMw==
+  dependencies:
+    debug "^4.1.0"
+    devtools-protocol "0.0.869402"
+    extract-zip "^2.0.0"
+    https-proxy-agent "^5.0.0"
+    node-fetch "^2.6.1"
+    pkg-dir "^4.2.0"
+    progress "^2.0.1"
+    proxy-from-env "^1.1.0"
+    rimraf "^3.0.2"
+    tar-fs "^2.0.0"
+    unbzip2-stream "^1.3.3"
+    ws "^7.2.3"
+
 queue-microtask@^1.2.2:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/queue-microtask/-/queue-microtask-1.2.3.tgz#4929228bbc724dfac43e0efb058caf7b6cfb6243"
@@ -8116,7 +8351,7 @@ semver@^6.1.1, semver@^6.1.2, semver@^6.3.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
-semver@^7.2.1, semver@^7.3.5:
+semver@^7.2.1, semver@^7.3.5, semver@~7.3.5:
   version "7.3.5"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.5.tgz#0b621c879348d8998e4b0e4be94b3f12e6018ef7"
   integrity sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==
@@ -8894,7 +9129,7 @@ through2@~0.5.1:
     readable-stream "~1.0.17"
     xtend "~3.0.0"
 
-through@2, through@^2.3.4, through@~2.3, through@~2.3.1, through@~2.3.4:
+through@2, through@^2.3.4, through@^2.3.8, through@~2.3, through@~2.3.1, through@~2.3.4:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
   integrity sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=
@@ -8966,6 +9201,11 @@ trough@^2.0.0:
   resolved "https://registry.yarnpkg.com/trough/-/trough-2.0.2.tgz#94a3aa9d5ce379fc561f6244905b3f36b7458d96"
   integrity sha512-FnHq5sTMxC0sk957wHDzRnemFnNBvt/gSY99HzK8F7UP5WAbvP70yX5bd7CjEQkN+TjdxwI7g7lJ6podqrG2/w==
 
+tryer@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/tryer/-/tryer-1.0.1.tgz#f2c85406800b9b0f74c9f7465b81eaad241252f8"
+  integrity sha512-c3zayb8/kWWpycWYg87P71E1S1ZL6b6IJxfb5fvsUgsf0S2MVGaDhDXXjDMpdCpfWXqptc+4mXwmiy1ypXqRAA==
+
 ts-morph@^12.0.0:
   version "12.2.0"
   resolved "https://registry.yarnpkg.com/ts-morph/-/ts-morph-12.2.0.tgz#3332319cecd44aff0b7b410f1fe39637499b1a1b"
@@ -9189,6 +9429,14 @@ unbox-primitive@^1.0.1:
     has-symbols "^1.0.2"
     which-boxed-primitive "^1.0.2"
 
+unbzip2-stream@^1.3.3:
+  version "1.4.3"
+  resolved "https://registry.yarnpkg.com/unbzip2-stream/-/unbzip2-stream-1.4.3.tgz#b0da04c4371311df771cdc215e87f2130991ace7"
+  integrity sha512-mlExGW4w71ebDJviH16lQLtZS32VKqsSfk80GCfUlwT/4/hNRFsoscrF/c++9xinkMzECL1uL9DDwXqFWkruPg==
+  dependencies:
+    buffer "^5.2.1"
+    through "^2.3.8"
+
 unconfig@^0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/unconfig/-/unconfig-0.2.2.tgz#08742355bdadb8cf9d1f1870a971fec87f38726e"
@@ -9785,6 +10033,11 @@ word-wrap@^1.2.3, word-wrap@~1.2.3:
   resolved "https://registry.yarnpkg.com/word-wrap/-/word-wrap-1.2.3.tgz#610636f6b1f703891bd34771ccb17fb93b47079c"
   integrity sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==
 
+wordwrap@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
+  integrity sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=
+
 workbox-background-sync@6.4.2:
   version "6.4.2"
   resolved "https://registry.yarnpkg.com/workbox-background-sync/-/workbox-background-sync-6.4.2.tgz#bb31b95928d376abcb9bde0de3a0cef9bae46cf7"
@@ -9972,6 +10225,11 @@ wrappy@1:
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
   integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
 
+ws@^7.2.3:
+  version "7.5.6"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.5.6.tgz#e59fc509fb15ddfb65487ee9765c5a51dec5fe7b"
+  integrity sha512-6GLgCqo2cy2A2rjCNFlxQS6ZljG/coZfZXclldI8FB/1G3CCI36Zd8xy2HrFVACi8tfk5XrgLQEk+P0Tnz9UcA==
+
 xregexp@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/xregexp/-/xregexp-2.0.0.tgz#52a63e56ca0b84a7f3a5f3d61872f126ad7a5943"
@@ -10080,6 +10338,14 @@ yargs@^15.1.0:
     y18n "^4.0.0"
     yargs-parser "^18.1.2"
 
+yauzl@^2.10.0:
+  version "2.10.0"
+  resolved "https://registry.yarnpkg.com/yauzl/-/yauzl-2.10.0.tgz#c7eb17c93e112cb1086fa6d8e51fb0667b79a5f9"
+  integrity sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=
+  dependencies:
+    buffer-crc32 "~0.2.3"
+    fd-slicer "~1.1.0"
+
 ylru@^1.2.0:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/ylru/-/ylru-1.2.1.tgz#f576b63341547989c1de7ba288760923b27fe84f"