build: Cleanup local linting rules

Author: edg2s

.eslintrc.json

@@ -3,8 +3,5 @@
 		"wikimedia",
 		"wikimedia/node",
 		"wikimedia/language/es2016"
-	],
-	"rules": {
-		"no-catch-shadow": "error"
-	}
+	]
 }

test-all/.eslintrc.js

@@ -5,6 +5,8 @@ const rules = require( '../index.js' ).rules;
 rulesDirPlugin.RULES_DIR = './src/rules';
 
 const conf = {
+	"root": true,
+	"extends": "wikimedia/client",
 	"plugins": [
 		"rulesdir"
 	],

test-all/methods.js

@@ -8,7 +8,8 @@
  * The rule prefix is renamed from no-jquery to rulesdir as the
  * rules are loaded directly via the rulesdir plugin.
  */
-var $x;
+
+/* global $x */
 $x.add();
 $x.addBack();
 $x.after();