Update peerDependencies to support redux@4

There are no breaking changes relative to this plugin. The middleware api hasn't changed.

Author: mbret

package.json

@@ -58,7 +58,7 @@
  "redux-storage-merger-simple": "^1.0.2"
  },
  "peerDependencies": {
- "redux": "^3.0.0 || ^2.0.0 || ^1.0.0 || 1.0.0-alpha || 1.0.0-rc"
+ "redux": "^4.0.0 || ^3.0.0 || ^2.0.0 || ^1.0.0 || 1.0.0-alpha || 1.0.0-rc"
  },
  "browserify": {
  "transform": [