Sunweg

fix savings returned as string by the API.

**Full Changelog**: https://github.com/rokam/sunweg/compare/3.0.0...3.0.1

Updated API to v2.

Plant properties `kwh_per_kwp` and `performance_rate` are deprecated and will return 0 as API won't return that info anymore.

**Full Changelog**: https://github.com/rokam/sunweg/compare/2.1.1...3.0.0

What's Changed
* Treat when the API returns null as lastupdate date by rokam in https://github.com/rokam/sunweg/pull/10


**Full Changelog**: https://github.com/rokam/sunweg/compare/2.1.0...2.1.1

What's Changed
* Added ability to retrieve energy production statistics by rokam in https://github.com/rokam/sunweg/pull/7
* Update setup.py, exclude 'tests' by onkelbeh in https://github.com/rokam/sunweg/pull/8
* fix(auth): should return false on bad authentication by rokam in https://github.com/rokam/sunweg/pull/9

New Contributors
* onkelbeh made their first contribution in https://github.com/rokam/sunweg/pull/8

**Full Changelog**: https://github.com/rokam/sunweg/compare/2.0.3...2.1.0

Fix receive None when expecting value and metric

**Full Changelog**: https://github.com/rokam/sunweg/compare/2.0.2...2.0.3

Fix to the new API contract

**Full Changelog**: https://github.com/rokam/sunweg/compare/2.0.1...2.0.2