chore(deps): phpunit to v9.6

Author: simPod

composer.json

@@ -29,7 +29,7 @@
         "phpstan/phpstan": "^1.3",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.1",
-        "phpunit/phpunit": "^9.2",
+        "phpunit/phpunit": "^9.6",
         "psalm/plugin-phpunit": "^0.18.0",
         "roave/infection-static-analysis-plugin": "^1.31",
         "thecodingmachine/phpstan-safe-rule": "^1.0",