* Add speech to text example in docs
* Add caption formats for audio transcription
* Add caption example to README
* Address sanity check errors
* Add tests for decodeResponse
* Use typechecker for audio response format
* Decoding response refactors
* add form builder
* cover VariImage
* test for closing errors
* simplify tests
* add audio api test coverage
* don't leak authToken when printed
* rename api->client
* fix test