Revert: chore(package): update react-router to version 4.1.1
Revert: chore(package): update react-router to version 4.1.1

Closes #144

https://greenkeeper.io/ (fb2ab61f52888a3cb84b15b6c5cc17945439cf92)

r3dDoX/geekplanet,r3dDoX/geekplanet,r3dDoX/geekplanet