chore(config): move Stylelint to package.json and drop contribute.json

.gitattributes

@@ -1,22 +1,5 @@
-# Auto detect text files and perform LF normalization
-* text=auto
+# Enforce Unix newlines
+* text=auto eol=lf
 
-# Custom for Visual Studio
-*.cs     diff=csharp
-*.sln    merge=union
-*.csproj merge=union
-*.vbproj merge=union
-*.fsproj merge=union
-*.dbproj merge=union
-
-# Standard to msysgit
-*.doc	 diff=astextplain
-*.DOC	 diff=astextplain
-*.docx diff=astextplain
-*.DOCX diff=astextplain
-*.dot  diff=astextplain
-*.DOT  diff=astextplain
-*.pdf  diff=astextplain
-*.PDF	 diff=astextplain
-*.rtf	 diff=astextplain
-*.RTF	 diff=astextplain
+# Don't diff or textually merge source maps
+*.map binary

package.json

@@ -72,6 +72,31 @@
     "uglify-es": "^3.3.9",
     "webextension-polyfill": "^0.4.0"
   },
+  "stylelint": {
+    "extends": "stylelint-config-standard-scss",
+    "rules":  {
+      "no-invalid-position-at-import-rule": null,
+      "comment-whitespace-inside": null,
+      "string-quotes": null,
+      "color-function-notation": null,
+      "at-rule-empty-line-before": null,
+      "declaration-empty-line-before": null,
+      "comment-empty-line-before": null,
+      "max-line-length": 365,
+      "max-empty-lines": 2,
+      "no-duplicate-selectors": null,
+      "no-descending-specificity": null,
+      "selector-type-no-unknown": null,
+      "selector-list-comma-newline-after": null,
+      "number-leading-zero": null,
+      "scss/no-global-function-names": null,
+      "scss/operator-no-newline-before": null,
+      "scss/dollar-variable-colon-space-after": null,
+      "scss/function-quote-no-quoted-strings-inside": null,
+      "scss/function-unquote-no-unquoted-strings-inside": null,
+      "scss/dollar-variable-empty-line-before": null
+    }
+  },
   "bundlewatch": {
     "files": [
       {