Require at least ^3.3 of phpunit-mock-object as there is a bug in < 3.3

Author: AydinHassan

composer.json

@@ -35,6 +35,7 @@
     "require-dev": {
         "composer/composer": "^1.2",
         "phpunit/phpunit": "^5.6",
+        "phpunit/phpunit-mock-objects": "^3.3",
         "squizlabs/php_codesniffer": "^2.4"
     },
     "autoload" : {