build: Updating dependencies

composer:
* mediawiki/mediawiki-codesniffer: 29.0.0 → 30.0.0

npm:
* eslint-config-wikimedia: 0.15.0 → 0.15.3
  The following rules are failing and were disabled:
  * mediawiki/class-doc

* grunt-stylelint: 0.14.0 → 0.15.0
* stylelint-config-wikimedia: 0.9.0 → 0.10.1

Change-Id: I5daae7788d77df3eeb56228718cb54b98c49ae4d

composer.json

@@ -26,7 +26,7 @@
 	},
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "1.0.0",
-		"mediawiki/mediawiki-codesniffer": "29.0.0",
+		"mediawiki/mediawiki-codesniffer": "30.0.0",
 		"jakub-onderka/php-console-highlighter": "0.4.0",
 		"mediawiki/minus-x": "1.0.0",
 		"mediawiki/mediawiki-phan-config": "0.9.1"