update changelog for new version

0.23.1 release (#1075)

* update changelog

* update 2024

make release

Merge pull request #1024 from rasbt/0.23.0

0.23.0

Merge pull request #972 from rasbt/0.21.0

0.21.0 release

Merge pull request #945 from rasbt/v0.20.0

v0.2.0

Merge pull request #845 from rasbt/v0.19

0.19 release

V0.18.0 (#711)

* v 0.18.0

* v0.18.0 release

V0.18.0 (#711)

* v 0.18.0

* v0.18.0 release