chore(package): update react to version 15.6.0

Author: greenkeeper[bot]

package.json

@@ -101,7 +101,7 @@
     "validate-commit-msg": "^2.8.2"
   },
   "peerDependencies": {
-    "react": "0.14.x || ^15.0.0",
+    "react": "15.6.0",
     "redux-features": "^1.0.0"
   },
   "dependencies": {