Update dependency i18next to v17.0.18

Thalia Technicie
2019-10-08T15:19:19+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [i18next](http://i18next.com) ([source](https://github.com/i18next/i18next)) | dependencies | patch | [`17.0.6` -> `17.0.18`](https://renov...

i18next (source) | dependencies | patch | 17.0.6 -> 17.0.18