build: Updating npm dependencies

* eslint-config-wikimedia: 0.16.2 → 0.17.0
  The following rules are failing and were disabled:
  * no-shadow

* grunt: 1.2.1 → 1.3.0

Change-Id: I35acdb64081ede997f799ac57624403d1e83ec11

.eslintrc.json

@@ -7,6 +7,7 @@
 	],
 	"rules": {
 		"no-jquery/no-global-selector": "off",
-		"mediawiki/class-doc": "warn"
+		"mediawiki/class-doc": "warn",
+		"no-shadow": "warn"
 	}
 }