allow to use PHPUnit 5

composer.json

@@ -35,8 +35,8 @@
         "seld/cli-prompt": "~1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.5",
-        "phpunit/phpunit-mock-objects": "2.3.0"
+        "phpunit/phpunit": "~4.5|^5.0.5",
+        "phpunit/phpunit-mock-objects": "2.3.0|~3.0"
     },
     "_": "phpunit/phpunit-mock-objects required in 2.3.0 due to https://github.com/sebastianbergmann/phpunit-mock-objects/issues/223 - needs hhvm 3.8+ on travis",
     "config": {