Signalwire

Added
- Support for Calling `tap`, `tap_async` methods.
- Support for Calling `send_digits`, `send_digits_async` methods.
- Support to send/receive faxes on the Call: `fax_receive`, `fax_receive_async`, `fax_send`, `fax_send_async`.
- Methods to start detectors on the Call: `detect`, `detect_async`, `detect_answering_machine`, `detect_answering_machine_async`, `detect_digit`, `detect_digit_async`, `detect_fax`, `detect_fax_async`.
- Set logging level via LOG_LEVEL env variable.
- Add `playRingtone` and `playRingtoneAsync` methods to simplify play a ringtone.

Added
- Support for Relay Messaging
- Support for Calling `connect` and `play` methods.
- Support for Calling `record` methods.
- Methods to wait some events on the Call object: `wait_for_ringing`, `wait_for_answered`, `wait_for_ending`, `wait_for_ended`.

Fixed
- Minor fix if using wrong SignalWire number.

Changed
- Default log level to INFO

Added
- Beta version of `Relay Client`
- `Relay Consumer` and `Tasks`

Fixed
- Possible issue on WebSocket reconnect due to a race condition on the EventLoop.

Fixed
- Allow initialization via ENV variable

Added
- Python 2 support
Fixed
- Importing LaML subclasses