Tuya-iot-py-sdk

- [update] hide sensitive info in the log
- [modify] _on_message to on_message in TuyaDeviceManger

[add] platform_url param in token
[add] Smart home scenes

Important

Breaking changes, New Tuya IoT Projects created after 2021-05-21 must use v0.3.0 or later.

New features

- Format method naming
- Update Open API sign algorithm
- Update log system to python logging
- Update sample
- Fix MQTT reconnect issue

[update] updateDeviceFunctionCache
[fix] mqtt reconnect

[fix] flake8 format code
[add] device_manager getDeviceSpecification

[fix] some bugs