Deal

What's Changed
* Support deal.pure in code generator by orsinium in https://github.com/life4/deal/pull/109


**Full Changelog**: https://github.com/life4/deal/compare/4.22.0...4.23.0

I accidentally released it as 4.21.2 but then realized that it has a feature included, not only a bug fix. So, now you have two releases with the same changes inside.

What's Changed
* Don't call typeguard if it's not available by munyari in https://github.com/life4/deal/pull/108
* Allow permanently disabling contracts by orsinium in https://github.com/life4/deal/pull/107

New Contributors
* munyari made their first contribution in https://github.com/life4/deal/pull/108

**Full Changelog**: https://github.com/life4/deal/compare/4.21.1...4.21.2

What's Changed
* Add special handling for missing deal_solver by rpdelaney in https://github.com/life4/deal/pull/106


**Full Changelog**: https://github.com/life4/deal/compare/4.21.0...4.21.1

What's Changed
* Correct variable reference in code sample by jgberry in https://github.com/life4/deal/pull/104
* Linter: extract exceptions from docstrings by orsinium in https://github.com/life4/deal/pull/105

New Contributors
* jgberry made their first contribution in https://github.com/life4/deal/pull/104

**Full Changelog**: https://github.com/life4/deal/compare/4.20.0...4.21.0

What's Changed
* Make some dependencies optional by orsinium in https://github.com/life4/deal/pull/103


**Full Changelog**: https://github.com/life4/deal/compare/4.19.2...4.20.0

What's Changed
* Improve linter behavior for `assert` by orsinium in https://github.com/life4/deal/pull/102


**Full Changelog**: https://github.com/life4/deal/compare/4.19.1...4.19.2