Bump gscan to version 1.4.3

no issue

- fixes a bug, that didn't catch errors caused by corrupt zip files
- uses a fork of the `extract-zip` dependency with a bug fix for https://github.com/maxogden/extract-zip/issues/65

package.json

@@ -57,7 +57,7 @@
     "ghost-storage-base": "0.0.3",
     "glob": "5.0.15",
     "got": "7.1.0",
-    "gscan": "1.4.2",
+    "gscan": "1.4.3",
     "html-to-text": "3.3.0",
     "image-size": "0.6.2",
     "intl": "1.2.5",

yarn.lock

@@ -15,6 +15,15 @@
   dependencies:
     samsam "1.3.0"
 
+"@tryghost/extract-zip@1.6.6":
+  version "1.6.6"
+  resolved "https://registry.yarnpkg.com/@tryghost/extract-zip/-/extract-zip-1.6.6.tgz#937e0e775fec6dea937ac49d73a068bcafb67f50"
+  dependencies:
+    concat-stream "1.6.0"
+    debug "2.6.9"
+    mkdirp "0.5.0"
+    yauzl "2.4.1"
+
 JSONSelect@0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/JSONSelect/-/JSONSelect-0.4.0.tgz#a08edcc67eb3fcbe99ed630855344a0cf282bb8d"
@@ -1802,7 +1811,7 @@ extglob@^2.0.4:
     snapdragon "^0.8.1"
     to-regex "^3.0.1"
 
-extract-zip@1.6.6, extract-zip@^1.6.5:
+extract-zip@1.6.6:
   version "1.6.6"
   resolved "https://registry.yarnpkg.com/extract-zip/-/extract-zip-1.6.6.tgz#1290ede8d20d0872b429fd3f351ca128ec5ef85c"
   dependencies:
@@ -2510,16 +2519,16 @@ grunt@~0.4.0:
     underscore.string "~2.2.1"
     which "~1.0.5"
 
-gscan@1.4.2:
-  version "1.4.2"
-  resolved "https://registry.yarnpkg.com/gscan/-/gscan-1.4.2.tgz#df98dddd856b45e782fecea7a6e305388870dcea"
+gscan@1.4.3:
+  version "1.4.3"
+  resolved "https://registry.yarnpkg.com/gscan/-/gscan-1.4.3.tgz#ebea3c78106f4d8562225d46754d0a41c3e0a348"
   dependencies:
+    "@tryghost/extract-zip" "1.6.6"
     bluebird "^3.4.6"
     chalk "^1.1.1"
     commander "2.15.1"
     express "^4.16.2"
     express-hbs "^1.0.3"
-    extract-zip "^1.6.5"
     fs-extra "^0.26.2"
     ghost-ignition "2.9.2"
     glob "^7.0.5"