Sunsynk

**Full Changelog**: https://github.com/kellerza/sunsynk/compare/v0.2.8...v0.2.9

What's Changed
* Essential power test sensors & timeouts by kellerza in https://github.com/kellerza/sunsynk/pull/85


**Full Changelog**: https://github.com/kellerza/sunsynk/compare/v0.2.7...v0.2.8

- Python sunsynk module 0.2.7:
- Add bitmask sensors to support Modes (GM/BM/CM)

- Sunsynk Dev Add-On:
- Update sunsynk library to use the latest sensors

Sunsynk Lib changes

- `load_limit" configuration option allows you to configure where the inverter (PV & battery) will supply power. Can be "Allow Export", "Zero Export" and "Essentials" only. Essentials is displayed as "Limit to Load" in the inverter's System Mode configuration.

Other changes
* Update README.md by N1c084 in https://github.com/kellerza/sunsynk/pull/51
* Use round_robin filter for RWSensors by Ivan-L in https://github.com/kellerza/sunsynk/pull/62
* Allow NumberEntity mode to be customized by Ivan-L in https://github.com/kellerza/sunsynk/pull/58


**Full Changelog**: https://github.com/kellerza/sunsynk/compare/v0.2.5...v0.2.6

What's Changed
* More writable sensors by Ivan-L in https://github.com/kellerza/sunsynk/pull/57


**Full Changelog**: https://github.com/kellerza/sunsynk/compare/v0.2.4...v0.2.5