v2.16.0

This is the first version of pyerrors that does not support python 3.9

What's Changed

• [ci] Add python 3.14 runners for pytest workflow by @fjosw in #270
• [chore] Remove support for python 3.9 and bump python versions in runners by @fjosw in #273
• [Fix] corrected expected_chisquare by adding the number of priors by @PiaLJP in #274
• Feat/idl func by @jkuhl-uni in #275

Full Changelog: v2.15.1...v2.16.0