* [ios] #3979 wip gzip telemetry events
* [ios] expose compression from core instead of adding a new dependency
* [ios] #3979 Exposed decompress from mbgl and added a test case
* [ios] #3979 cleanup
* [ios] #3979 cleaned up test case
* [ios] #3979 cleanup
* [ios] #3979 gzip -> deflate