Added custom no-cross-requires eslint rule [soft]

refs: 7e787ef807

- bumps eslint-plugin-ghost to 2.1.0 which adds the code for a new custom rule
- adds configuration to our eslint file to enable the rule in a very soft mode for now
- this rule is intended to enforce not tightly coupling the server and frontend
- the intention is to make it stricter over time as the number of cross requires reduces
- enabling this rule temporarily and running lint is a nice way to grok just how tightly coupled things are at the moment

.eslintrc.json

@@ -10,9 +10,11 @@
         "plugin:ghost/node"
     ],
     "rules": {
-        // TODO: remove this rule once it's turned into "error" in the base plugin
+        // @TODO: remove this rule once it's turned into "error" in the base plugin
         "no-shadow": "error",
         "no-var": "error",
-        "one-var": [2, "never"]
+        "one-var": [2, "never"],
+        // @TODO: enable this for all components once it gets a bit quieter
+        "ghost/ghost-custom/no-cross-requires": ["warn", {"shared": true, "server": false, "frontend": false}]
     }
 }

package.json

@@ -150,7 +150,7 @@
     "coffeescript": "2.5.1",
     "cssnano": "5.0.1",
     "eslint": "7.25.0",
-    "eslint-plugin-ghost": "2.0.0",
+    "eslint-plugin-ghost": "2.1.0",
     "grunt": "1.4.0",
     "grunt-bg-shell": "2.3.3",
     "grunt-contrib-clean": "2.0.0",

yarn.lock

@@ -3152,10 +3152,10 @@ eslint-plugin-ember@9.3.0:
     lodash.kebabcase "^4.1.1"
     snake-case "^3.0.3"
 
-eslint-plugin-ghost@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-ghost/-/eslint-plugin-ghost-2.0.0.tgz#14e67180188850abf978df772e02bb74b1832374"
-  integrity sha512-BlygF0CZr/38ena3qztpyCuo7z1KsbbjEz0FO3zjfg+V6Id5wcZsKTaOdFHFZwyDl4kBm5jujFAsWILh/DtNiQ==
+eslint-plugin-ghost@2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-ghost/-/eslint-plugin-ghost-2.1.0.tgz#811402f32e6339be526368b1ce1b3b4be26a2e4d"
+  integrity sha512-zeAFtxthQ8GaC1LV4e+n6DMfLfl8AEAagYT63SQ1jYzYykK4Wmh0xEADMR0tZFl8eHzTornAyQWmWSwS7CUkXQ==
   dependencies:
     eslint-plugin-ember "9.3.0"
     eslint-plugin-mocha "8.0.0"