eslint: Lint root folder with server rules

Change-Id: I372eef293983bff0c79ad8aa0da1c7e5d07b1e44

.eslintrc.json

@@ -1,14 +1,8 @@
 {
 	"root": true,
 	"extends": [
-		"wikimedia/client-es5",
-		"wikimedia/jquery",
-		"wikimedia/mediawiki"
+		"wikimedia/server"
 	],
-	"globals": {
-		"ve": "readonly",
-		"RangeFix": "readonly"
-	},
 	"overrides": [
 		{
 			"files": [

Gruntfile.js

@@ -1,7 +1,7 @@
-/* eslint-env node, es6 */
+'use strict';
 
 module.exports = function ( grunt ) {
-	var conf = grunt.file.readJSON( 'extension.json' );
+	const conf = grunt.file.readJSON( 'extension.json' );
 	grunt.loadNpmTasks( 'grunt-banana-checker' );
 	grunt.loadNpmTasks( 'grunt-eslint' );
 	grunt.loadNpmTasks( 'grunt-stylelint' );

modules/.eslintrc.json

@@ -1,4 +1,14 @@
 {
+	"root": true,
+	"extends": [
+		"wikimedia/client-es5",
+		"wikimedia/jquery",
+		"wikimedia/mediawiki"
+	],
+	"globals": {
+		"ve": "readonly",
+		"RangeFix": "readonly"
+	},
 	"rules": {
 		"no-implicit-globals": "off",
 		"max-len": "off"

tests/qunit/.eslintrc.json

@@ -1,5 +1,7 @@
 {
+	"root": true,
 	"extends": [
+		"../../modules/.eslintrc.json",
 		"wikimedia/qunit"
 	],
 	"rules": {