Found while running code coverage we missed a dependency - symfony config

Author: redthor

composer.json

@@ -16,6 +16,7 @@
  "symfony/dependency-injection": "^2.7 || ^3.3 || ^4.0",
  "symfony/http-kernel": "^2.7 || ^3.3 || ^4.0",
  "symfony/console": "^2.7 || ^3.3 || ^4.0",
+ "symfony/config": "^2.7 || ^3.3 || ^4.0",
  "doesntmattr/mongodb-migrations": "^1.1",
  "doctrine/mongodb-odm": "^1.0"
  },