bump MediaWiki codesniffer standard 574f68d..0bebf0f7b

Shortlog:

Antoine Musso (1):
      lines longer than 100 will simply warn (no error)
Siebrand Mazeland (1):
      Disable rule Squiz.WhiteSpace.OperatorSpacing

Change-Id: Ia4b1d5e3403b6d71ac542409c74aafb710882f05