2.0.1 - Hotfix

This hotfix fixes a rare corruption case in deflate_quick, used by compression level 1.

Changes since 2.0.0:

• #880 Fix block_open handling in deflate_quick.

Known issues:

• #869 Silent corruption with DFLTCC enabled (only affects IBM Z architecture). [Being worked on by @iii-i]
• #873 Compilation failure on FreeBSD older than version 12. [PR abandoned, help wanted]