Latest release with config_flow

This is release 0.41.20, which includes config_flow.

It is recommended over 0.31.20, which is identical, but without config_flow.

Generally, switching from no config_flow should be considered a one-way migration. Going back is not impossible, but requires some work.

The addition of config_flow is thanks to @trvrnrth!

Highlights: Increased reliability, and evohome faults are becoming a first-class citizen. Also, binding of fake HVAC remotes may now work, where they did not before.

Changes include:

• refactoring of Evohome system faults binary sensor
• addition of get_system_faults service call for evohome controllers
• bump ramses_rf client to 0.31.20
• homogenising sensor descriptors between both config_flow/non-config_flow releases
• hardening test suite - increasing coverage

Changes to ramses_rf include:

• will use pyserial-asyncio-fast if available (may fix #184)
• changes to protocol and startup (may fix #181, #182)
• fix bug that prevented HVAC remotes from binding
• improvements to startup of the serial transport - ?more reliable (may fix #184)
• improvements to the MQTT transport
• less logspam, and more informative logging otherwise
• improvements to 1030, 1260, 3220 parsers
• bugfix excessive polling for OpenTherm bridges (esp. 3220 params/schema pkts)
• various other refactoring, fixes, some minor deprecations, and more intense QA/QI