Bug 1620537 - Fix eslint issues in devtools .eslintrc*.js files now that ESLint 7 will lint them. r=mossop

Depends on D84815

Differential Revision: https://phabricator.services.mozilla.com/D84816

devtools/.eslintrc.mochitests.js

@@ -2,31 +2,31 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+"use strict";
+
 // Parent config file for all devtools browser mochitest files.
 module.exports = {
-  "extends": [
-    "plugin:mozilla/browser-test"
-  ],
+  extends: ["plugin:mozilla/browser-test"],
   // All globals made available in the test environment.
-  "globals": {
-    "DevToolsUtils": true,
-    "gDevTools": true,
-    "once": true,
-    "synthesizeKeyFromKeyTag": true,
-    "TargetFactory": true,
-    "waitForTick": true,
-    "waitUntilState": true,
+  globals: {
+    DevToolsUtils: true,
+    gDevTools: true,
+    once: true,
+    synthesizeKeyFromKeyTag: true,
+    TargetFactory: true,
+    waitForTick: true,
+    waitUntilState: true,
   },
 
-  "parserOptions": {
-    "ecmaFeatures": {
-      "jsx": true,
-    }
+  parserOptions: {
+    ecmaFeatures: {
+      jsx: true,
+    },
   },
 
-  "rules": {
+  rules: {
     // Allow non-camelcase so that run_test doesn't produce a warning.
-    "camelcase": "off",
+    camelcase: "off",
     // Tests don't have to cleanup observers
     "mozilla/balanced-observers": 0,
     // Tests can always import anything.

devtools/.eslintrc.xpcshell.js

@@ -2,18 +2,18 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+"use strict";
+
 // Parent config file for all devtools xpcshell files.
 module.exports = {
-  "extends": [
-    "plugin:mozilla/xpcshell-test"
-  ],
-  "rules": {
+  extends: ["plugin:mozilla/xpcshell-test"],
+  rules: {
     // Allow non-camelcase so that run_test doesn't produce a warning.
-    "camelcase": "off",
+    camelcase: "off",
     "block-scoped-var": "off",
     // Tests don't have to cleanup observers
     "mozilla/balanced-observers": 0,
     // Tests can always import anything.
     "mozilla/reject-some-requires": "off",
-  }
+  },
 };

devtools/client/webconsole/test/node/.eslintrc.mocha.js

@@ -1,14 +1,14 @@
 "use strict";
 
 module.exports = {
-  "env": {
-    "browser": false,
-    "mocha": true,
+  env: {
+    browser: false,
+    mocha: true,
   },
 
-  "globals": {
+  globals: {
     // document and window are injected via jsdom-global.
-    "document": false,
-    "window": false,
-  }
-}
+    document: false,
+    window: false,
+  },
+};