Don't mock what you don't own (#66)

* Do not rely on mock for Doctrine manager nor registry

* Do not rely on mock for event dispatcher

* Do not rely on mock for symfony normalizer nor denormalizer

* Remove phpspec/prophecy-phpunit dev dependency from packages that are no longer using it

Author: yann-eugone

composer.json

@@ -21,7 +21,6 @@
         }
     },
     "require-dev": {
-        "phpspec/prophecy-phpunit": "^2.0",
         "phpunit/phpunit": "^9.5"
     },
     "autoload-dev": {