Update dev dependencies & fix CI (#52)

* Updated GitHub versions for non test jobs

* Updated dev dependencies

* Fix phpstan after update

* Add tests to cover changes

* Remove symplify/monorepo-builder from all CI jobs

Author: yann-eugone

composer.json

@@ -22,7 +22,7 @@
     },
     "require-dev": {
         "phpspec/prophecy-phpunit": "^2.0",
-        "phpunit/phpunit": "^9.4"
+        "phpunit/phpunit": "^9.5"
     },
     "autoload-dev": {
         "psr-4": {