build: Updating npm dependencies

* eslint-config-wikimedia: 0.22.1 → 0.24.0
  The following rules are failing and were disabled:
  * strict

* grunt: 1.5.3 → 1.6.1
* stylelint-config-wikimedia: 0.13.1 → 0.14.0
  The following rules are failing and were disabled:
  * selector-pseudo-element-colon-notation

Change-Id: If82350c9b111b8d590d0f89d6f51caa33ef46f30

.eslintrc.json

@@ -2,5 +2,8 @@
 	"root": true,
 	"extends": [
 		"wikimedia/server"
-	]
+	],
+	"rules": {
+		"strict": "warn"
+	}
 }