use 0.9 versions of mockery

Author: Douglas Greenshields

composer.json

@@ -22,7 +22,7 @@
     "require-dev": {
         "symfony/validator": "~2.7|~3.0",
         "phpunit/phpunit": "4.*",
-        "mockery/mockery": "~0.8.0",
+        "mockery/mockery": "~0.9.0",
         "symfony/console": "~2.7|~3.0"
     },
     "suggests": {