Update mediawiki/mediawiki-codesniffer requirement from 41.0.0 to 43.0.0

Updates the requirements on [mediawiki/mediawiki-codesniffer](https://github.com/wikimedia/mediawiki-tools-codesniffer) to permit the latest version.
- [Changelog](https://github.com/wikimedia/mediawiki-tools-codesniffer/blob/master/HISTORY.md)
- [Commits](wikimedia/mediawiki-tools-codesniffer@v41.0.0...v43.0.0)

---
updated-dependencies:
- dependency-name: mediawiki/mediawiki-codesniffer
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -3,7 +3,7 @@
 	"description": "",
 	"license": "GPL-3.0-or-later",
 	"require-dev": {
-		"mediawiki/mediawiki-codesniffer": "41.0.0",
+		"mediawiki/mediawiki-codesniffer": "43.0.0",
 		"mediawiki/mediawiki-phan-config": "0.12.1",
 		"mediawiki/minus-x": "1.1.3",
 		"php-parallel-lint/php-console-highlighter": "1.0.0",