Update dependency react-native-vector-icons to v6.6.0

Thalia Technicie
2019-06-27T15:29:26+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [react-native-vector-icons](https://github.com/oblador/react-native-vector-icons) | dependencies | minor | [`6.5.0` -> `6.6.0`](https://ren...