v2.8.4-rc1

tl;dr: blosc2 is in experimental on all platforms: cramjam.experimental.blosc2
tracking issue for its stabilization: #159
I'm sure there are (many) things to be fixed, and people wanting advanced / full feature sets of blosc2 should almost certainly just use the official blosc2 python package.

libcramjam (0.4.0) now has feature flags for each codec supported.

What's Changed

• Update libcramjam crate to 0.3.0 in cramjam-cli by @musicinmybrain in #152
• Add experimental blosc2 support by @milesgranger in #107
• Move sdist generations to own job by @milesgranger in #155
• Add blosc2 to CLI, libcramjam features and own CI by @milesgranger in #156

Full Changelog: v2.8.3...v2.8.4-rc1