Merge pull request #6 from Mou-Ikkai/dependabot/composer/0.7.x/phpunit/phpunit-9.3.11

Bump phpunit/phpunit from 7.5.20 to 9.3.11

composer.json

@@ -55,7 +55,7 @@
     "require-dev": {
         "swoole/ide-helper": "4.5.2",
         "appwrite/sdk-generator": "master",
-        "phpunit/phpunit": "^7.0"
+        "phpunit/phpunit": "^9.3"
     },
     "repositories": [
         {