Update dependency react-native-snackbar to v2

Thalia Technicie
2019-08-07T21:20:13+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [react-native-snackbar](https://github.com/cooperka/react-native-snackbar) | dependencies | major | [`1.0.2` -> `2.0.2`](https://renovatebo...