chore(package): update react to version 16.8.2

Closes #21

Author: greenkeeper[bot]

package.json

@@ -77,7 +77,7 @@
     "nodemon": "^1.9.0",
     "npm-run-all": "^4.0.1",
     "onchange": "^3.0.2",
-    "react": "^15.6.1",
+    "react": "^16.8.2",
     "react-router": "^4.2.0",
     "react-router-config": "^1.0.0-beta.4",
     "rimraf": "^2.5.4",