Support helpers 2.0

Author: bajb

composer.json

@@ -10,7 +10,7 @@
   ],
   "require": {
     "php": ">=5.6.0",
-    "packaged/helpers": "~1.0"
+    "packaged/helpers": "^1.0||^2.0"
   },
   "require-dev": {
     "phpunit/phpunit": "~4.8.0",