bump version to 0.24.0

Update to libraw 0.21.3 (#247)

Co-authored-by: Maik Riechert <maik.riechert@outlook.com>

Bump rawpy version to 0.23.1 (#244)

Relax minimum numpy version to 1.26.0 (#243)

Numpy 2 support, drop Python 3.8 (#234)

bump version to 0.21.0

Update to libraw 0.21.2 (#226)

more macos arm64 wheels

+3.12 -3.7 support (#214)

Bump version to 0.18.1 (#202)