Merge pull request #640 from martinssipenko/phpunit94

Upgrade to PHPUnit ^9.4

Author: Ocramius

composer.json

@@ -31,7 +31,7 @@
     },
     "require-dev": {
         "ext-phar":                     "*",
-        "phpunit/phpunit":              "^9.2.5",
+        "phpunit/phpunit":              "^9.4.1",
         "squizlabs/php_codesniffer":    "^3.5.5",
         "slevomat/coding-standard":     "^6.3.10",
         "doctrine/coding-standard":     "^8.1.0",