add nock and redux-mock-store for testing redux middleware

Author: AllenFang

package.json

@@ -125,12 +125,14 @@
     "jest": "18.1.0",
     "json-loader": "0.5.4",
     "mocha": "~3.3.0",
+    "nock": "^9.0.13",
     "node-sass": "^4.5.3",
     "object-assign": "4.1.1",
     "phantomjs-prebuilt": "~2.1.14",
     "postcss-loader": "1.2.2",
     "promise": "7.1.1",
     "react-dev-utils": "^0.5.2",
+    "redux-mock-store": "^1.2.3",
     "sass-loader": "^6.0.5",
     "sinon": "^2.3.4",
     "style-loader": "0.13.1",