Zigpy

Changes
* Auto detect zzh usb port
* Turn on led only while pairing

Test github workflow

Changes
- Access Groups cluster via `ep_attribute` when adding endpoint to a group 171

Fixes
- DoorLock cluster schema entries
- Thermostat cluster schema entries

New
Zigpy device group management (https://github.com/zigpy/zigpy/pull/156)

Fixes
`Time` Cluster response (https://github.com/zigpy/zigpy/pull/152)
`zigpy.zcl.foundation.ConfigureReportingResponseRecord` deserializtion/serialization methods (https://github.com/zigpy/zigpy/pull/161)
`zigpy.zcl.foundation.WriteAttributeResponseRecord` deserializtion/serialization methods (https://github.com/zigpy/zigpy/pull/161)

Changes
ZDO commands as Enum (https://github.com/zigpy/zigpy/pull/143)
ZCL Character string class (https://github.com/zigpy/zigpy/pull/147)
Allow Optional parameters for cluster commands/responses (https://github.com/zigpy/zigpy/pull/160)

Breaking
Sync up with [Zigpy 0.9.0 Release](https://github.com/zigpy/zigpy/releases/tag/0.9.0) `zigpy==0.9.0` is the minimum required version onward.

Changes
* Fetch ZDO "node descriptor" when device joins the network
* Update `LightLink` (touch link) cluster schema
* Pretty print received attribute updates
* `__repr__()` for `zcl.foundation.TypeValue` class