build: Updating mediawiki/mediawiki-codesniffer to 0.12.0

Change-Id: I5dd5bee53e7d720130926aeaa5d115b0806af27c

composer.json

@@ -1,7 +1,7 @@
 {
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "0.9.2",
-		"mediawiki/mediawiki-codesniffer": "0.11.0",
+		"mediawiki/mediawiki-codesniffer": "0.12.0",
 		"jakub-onderka/php-console-highlighter": "0.3.2"
 	},
 	"scripts": {

phpcs.xml

@@ -2,6 +2,7 @@
 <ruleset>
 	<rule ref="./vendor/mediawiki/mediawiki-codesniffer/MediaWiki">
 		<exclude name="MediaWiki.Commenting.FunctionComment.MissingParamComment"/>
+		<exclude name="MediaWiki.Files.ClassMatchesFilename.NotMatch"/>
 	</rule>
 	<file>.</file>
 	<arg name="extensions" value="php,php5,inc"/>