upgrade dependencies

Author: Roy Yu

package.json

@@ -93,8 +93,8 @@
     "react-router": "^4.2.0",
     "react-router-dom": "^4.2.2",
     "react-router-redux": "^4.0.8",
-    "redux": "^3.7.2",
-    "redux-actions": "^2.2.1",
+    "redux": "^4.0.0",
+    "redux-actions": "^2.3.0",
     "redux-saga": "^0.16.0",
     "reselect": "^3.0.1"
   },