Composer: update to PHPCSExtra 1.5.0

PHPCSExtra 1.5.0 has been released and offers 7 new sniffs, some of which we may want to use.

Ref: https://github.com/PHPCSStandards/PHPCSExtra/releases/tag/1.5.0

Author: jrfnl

.github/CONTRIBUTING.md

@@ -64,7 +64,7 @@ When you introduce new `public` sniff properties, or your sniff extends a class
 * WordPress-Coding-Standards
 * PHP_CodeSniffer 3.13.4 or higher
 * PHPCSUtils 1.1.0 or higher
-* PHPCSExtra 1.4.0 or higher
+* PHPCSExtra 1.5.0 or higher
 * PHPUnit 8.x - 9.x
 
 The WordPress Coding Standards use the `PHP_CodeSniffer` native unit test framework for unit testing the sniffs.

composer.json

@@ -23,7 +23,7 @@
 		"ext-xmlreader": "*",
 		"squizlabs/php_codesniffer": "^3.13.4",
 		"phpcsstandards/phpcsutils": "^1.1.0",
-		"phpcsstandards/phpcsextra": "^1.4.0"
+		"phpcsstandards/phpcsextra": "^1.5.0"
 	},
 	"require-dev": {
 		"phpcompatibility/php-compatibility": "^9.0",