Support PHPUnit 9

Author: Naktibalda

composer.json

@@ -19,7 +19,7 @@
 
     "require": {
         "php": ">=5.6.0 <8.0",
-        "codeception/phpunit-wrapper": ">6.0.15 <6.1.0 | ^6.6.1 | ^7.7.1 | ^8.0.3"
+        "codeception/phpunit-wrapper": ">6.0.15 <6.1.0 | ^6.6.1 | ^7.7.1 | ^8.0.3 | ^9.0"
     },
     "autoload":{
         "classmap": ["src/"]