Update requirements to support Country not being null

Nyholm · Nyholm · commit 3a88ff948a71 · 2017-09-16T12:25:29.000+02:00
diff --git a/composer.json b/composer.json
@@ -34,7 +34,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "4.0-dev"
+            "dev-master": "4.1-dev"
         }
     }
 }
