Envclasses

What's Changed
* Skip adding a second underscore in ENV prefix by christosvar in https://github.com/yukinarit/envclasses/pull/34
* Bump version to 0.3.1 by yukinarit in https://github.com/yukinarit/envclasses/pull/37


**Full Changelog**: https://github.com/yukinarit/envclasses/compare/v0.3.0...v0.3.1

What's Changed
* Add support for Optional types by van51 in https://github.com/yukinarit/envclasses/pull/32
* Bump version to v0.3.0 by yukinarit in https://github.com/yukinarit/envclasses/pull/33


**Full Changelog**: https://github.com/yukinarit/envclasses/compare/v0.2.8...v0.3.0

What's Changed
* Fix readme usage example by danidelvalle in https://github.com/yukinarit/envclasses/pull/28
* Use more correct return type annotation by yukinarit in https://github.com/yukinarit/envclasses/pull/30

New Contributors
* danidelvalle made their first contribution in https://github.com/yukinarit/envclasses/pull/28

**Full Changelog**: https://github.com/yukinarit/envclasses/compare/v0.2.7...v0.2.8

* Fix is_str bug with complex type hints ([d0811c2](https://github.com/yukinarit/envclasses/commit/d0811c2))
* Migrate from Pipenv to Poetry ([9c6a4d7](https://github.com/yukinarit/envclasses/commit/9c6a4d7))

* Fix import error bug instroduced in v0.2.5 ([fd3945c](https://github.com/yukinarit/envclasses/commit/fd3945c))

* Add LICENSE file ([d3156f0](https://github.com/yukinarit/envclasses/commit/d3156f0))
* Build API documentation with Github Actions ([d968050](https://github.com/yukinarit/envclasses/commit/d968050))
* Change development status to production/stable ([7a55098](https://github.com/yukinarit/envclasses/commit/7a55098))
* Disable parsing of str type ([4756463](https://github.com/yukinarit/envclasses/commit/4756463))
* Support python 3.10 ([00a8eda](https://github.com/yukinarit/envclasses/commit/00a8eda))
* Support python 3.9 ([5527d01](https://github.com/yukinarit/envclasses/commit/5527d01))
* Update comments and README ([a711c66](https://github.com/yukinarit/envclasses/commit/a711c66))