Temporary use the develop versions of helpers and router

These should be changed to stable versions before release. Also the composer lock file must be updated.

Author: geerteltink

composer.json

@@ -21,7 +21,8 @@
         "php": "^5.5 || ^7.0",
         "container-interop/container-interop": "^1.1",
         "psr/http-message": "^1.0",
-        "zendframework/zend-expressive-helpers": "^1.1 || ^2.0",
+        "zendframework/zend-expressive-helpers": "^3.0.0-dev",
+        "zendframework/zend-expressive-router": "^2.0.0-dev",
         "zendframework/zend-expressive-template": "^1.0.1",
         "zendframework/zend-filter": "^2.6.1",
         "zendframework/zend-i18n": "^2.6",