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

.stylelintrc.json

@@ -1,6 +1,7 @@
 {
 	"extends": "stylelint-config-wikimedia",
 	"rules": {
-		"declaration-property-unit-disallowed-list": null
+		"declaration-property-unit-disallowed-list": null,
+		"selector-pseudo-element-colon-notation": null
 	}
 }