Update dependency react-navigation to v3.11.1

Thalia Technicie
2019-08-03T18:52:44+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [react-navigation](https://github.com/react-navigation/react-navigation) | dependencies | patch | [`3.11.0` -> `3.11.1`](https://renovatebo...