Support bzip2 compression format

[marxin]

📜 Checklist

• [x] Commits are cleanly separated and have useful messages
• [x] A changelog entry or entries has been added to CHANGELOG.md
• [x] Documentation is thorough
• [ ] Test coverage is excellent and passes
• [ ] Works when tests are run --all-features enabled

[marxin]

I've verified the bzip2 decompression support on an openSUSE kernel RPM file (where Bzip2 compression is used for legacy reasons).