Pysungrow

Feature
* Handle device without software version variables ([`4679e0a`](https://github.com/02JanDal/pysungrow/commit/4679e0a8763e9cc41c90829d8850cb336fc2f47c))
* Add support for pymodbus v2.5.3 ([`2bd713b`](https://github.com/02JanDal/pysungrow/commit/2bd713bfe7a83d13c883bc20a4aa62fa69573147))

Fix
* Cover some edge cases in reported register values ([`6ef0d4c`](https://github.com/02JanDal/pysungrow/commit/6ef0d4cd6e0fe46ca9881b771692a257c35baade))

Feature
* Prepare for major release ([`95bcd77`](https://github.com/02JanDal/pysungrow/commit/95bcd7799e987b17985ab5685330610bf8078f5e))

Breaking
* prepare for major release ([`95bcd77`](https://github.com/02JanDal/pysungrow/commit/95bcd7799e987b17985ab5685330610bf8078f5e))

Feature
* Initial commit ([`f4e3889`](https://github.com/02JanDal/pysungrow/commit/f4e388908b8d7c85534aeef272f9f1280aa4f812))