Merge pull request #10 from Codeception/revert-9-suggest_phpunit-mock-objects

Revert "Mark PHPUnit mandatory"

Author: Naktibalda

composer.json

@@ -10,6 +10,9 @@
         }
     },
     "require": {
+        "phpunit/phpunit-mock-objects": ">2.3 <7.0"
+    },
+    "require-dev": {
         "phpunit/phpunit": ">=4.8 <8.0"
     }
 }