build: Updating mediawiki/mediawiki-codesniffer to 24.0.0

MLEB extensions now supporting php7

Change-Id: I582418eb4038114d0e751797bc17929ca4633867

composer.json

@@ -26,7 +26,7 @@
 	},
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "1.0.0",
-		"mediawiki/mediawiki-codesniffer": "19.1.0",
+		"mediawiki/mediawiki-codesniffer": "24.0.0",
 		"jakub-onderka/php-console-highlighter": "0.3.2",
 		"mediawiki/minus-x": "0.3.1"
 	},