fix(package): update react-redux to version 6.0.0

Author: greenkeeper[bot]

package.json

@@ -11,7 +11,7 @@
     "react": "^16.6.0",
     "react-apollo": "^2.2.4",
     "react-dom": "^16.6.0",
-    "react-redux": "^5.0.7",
+    "react-redux": "^6.0.0",
     "react-scripts": "2.1.0",
     "redux": "^4.0.1"
   },