Add condition for zend-config in version 3

Author: tck

composer.json

@@ -24,7 +24,7 @@
         "zendframework/zend-mvc": "^3.0.1",
         "zendframework/zend-loader": "^2.5.1",
         "zendframework/zend-modulemanager": "^2.7.2",
-        "zendframework/zend-config": "^2.6",
+        "zendframework/zend-config": "^2.6 || ^3.0",
         "zendframework/zend-cache": "^2.7.1",
         "zendframework/zend-log": "^2.9",
         "zendframework/zend-view": "^2.8",