Update dependency unorm to v1.6.0

Thalia Technicie
2019-07-07T21:42:06+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [unorm](https://github.com/walling/unorm) | dependencies | minor | [`1.5.0` -> `1.6.0`](https://renovatebot.com/diffs/npm/unorm/1.5.0/1.6.0...