Actually fixed the tests

Author: GrahamCampbell

composer.json

@@ -23,6 +23,7 @@
     },
     "require-dev": {
         "mockery/mockery": "^1.0",
+        "phpdocumentor/type-resolver": "0.4.*",
         "phpunit/phpunit": "^6.4",
         "doctrine/instantiator": "^1.0.5"
     },