Un1qnx-api

Added

* Create, update and delete methods for product API - [ripe-robin-revamp/363](https://github.com/ripe-tech/ripe-robin-revamp/issues/363)

Changed

* Patch tag method receives updated tag body instead of just state - [ripe-robin-revamp/363](https://github.com/ripe-tech/ripe-robin-revamp/issues/363)
* Bump Un1qnx API version to v3 - [ripe-robin-revamp/363](https://github.com/ripe-tech/ripe-robin-revamp/issues/363)

Added

* Basic `ProductAPI` and `TagAPI` with `BaseAPI` authentication
* Tag state updates (activation, expiration, ...)
* Tag state updates by barcode (serial number)