fix(package): update redux-form to version 7.4.1

Closes #244

Author: greenkeeper[bot]

package.json

@@ -123,7 +123,7 @@
     "redux": "3.7.1",
     "redux-actions": "2.1.0",
     "redux-api-middleware": "1.0.3",
-    "redux-form": "7.0.0",
+    "redux-form": "7.4.1",
     "redux-freeze": "0.1.4",
     "redux-multi": "0.1.12",
     "redux-promise": "0.5.3",