switch back to upstream tesla
The patch we required got merged upstream: https://github.com/teamon/tesla/commit/9f7261ca49f9f901ceb73b60219ad6f8a9f6aa30
The patch we required got merged upstream: https://github.com/teamon/tesla/commit/9f7261ca49f9f901ceb73b60219ad6f8a9f6aa30