lint: Convert eslint JSON to YAML

gjs has changed its configuration to YAML, so switch to that format
to keep syncing possible.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/818

lint/eslintrc-gjs.yml

@@ -0,0 +1,88 @@
+---
+env:
+  es6: true
+extends: 'eslint:recommended'
+rules:
+  array-bracket-newline:
+    - error
+    - consistent
+  array-bracket-spacing:
+    - error
+    - never
+  arrow-spacing: error
+  brace-style: error
+  comma-spacing:
+    - error
+    - before: false
+      after: true
+  indent:
+    - error
+    - 4
+    - ignoredNodes:
+      # Allow not indenting the body of GObject.registerClass, since in the
+      # future it's intended to be a decorator
+      - 'CallExpression[callee.object.name=GObject][callee.property.name=registerClass] > ClassExpression:first-child'
+      # Allow dedenting chained member expressions
+      MemberExpression: 'off'
+  key-spacing:
+    - error
+    - beforeColon: false
+      afterColon: true
+  keyword-spacing:
+    - error
+    - before: true
+      after: true
+  linebreak-style:
+    - error
+    - unix
+  no-empty:
+    - error
+    - allowEmptyCatch: true
+  no-implicit-coercion:
+    - error
+    - allow:
+      - '!!'
+  no-restricted-properties:
+    - error
+    - object: Lang
+      property: bind
+      message: Use arrow notation or Function.prototype.bind()
+    - object: Lang
+      property: Class
+      message: Use ES6 classes
+  nonblock-statement-body-position:
+    - error
+    - below
+  object-curly-newline:
+    - error
+    - consistent: true
+  object-curly-spacing: error
+  prefer-template: error
+  quotes:
+    - error
+    - single
+    - avoidEscape: true
+  semi:
+    - error
+    - always
+  semi-spacing:
+    - error
+    - before: false
+      after: true
+  space-before-blocks: error
+  space-infix-ops:
+    - error
+    - int32Hint: false
+globals:
+  ARGV: readonly
+  Debugger: readonly
+  GIRepositoryGType: readonly
+  imports: readonly
+  Intl: readonly
+  log: readonly
+  logError: readonly
+  print: readonly
+  printerr: readonly
+  window: readonly
+parserOptions:
+  ecmaVersion: 2017