Support redux 4.0

Author: timdorr

package.json

@@ -48,7 +48,7 @@
   "homepage": "https://github.com/gaearon/react-redux",
   "peerDependencies": {
     "react": "^0.14.0 || ^15.0.0-0 || ^16.0.0-0",
-    "redux": "^2.0.0 || ^3.0.0"
+    "redux": "^2.0.0 || ^3.0.0 || ^4.0.0-0"
   },
   "dependencies": {
     "hoist-non-react-statics": "^2.5.0",