Version 1.5.0.0

• Removed old function which generated custom block header
• Updated zstd to new upstream version 1.5.0
• Fix and simplify unit tests

BUILD BROKEN

Version 1.4.9.1

• Fix python 3.8+ warnings about rigth size_t type for # formats
• Update unittests - use os.environ everywhere

Version 1.4.9.0

• Update bundled zstd library to 1.4.9 release
• Fix minor compiler warnings about string functions

Version 1.4.8.1

Allow ultra-fast levels from -100 to -1

Version 1.4.8.0

Update bundled zstd library to 1.4.8 release

Version 1.4.5.1

• Fix MacOs build - undefined type S32. (since 1.4.4.1)

Version 1.4.5.0

Update zstd to 1.4.5

Version 1.4.4.1

• Use multi-threaded libzstd API - almost linear by CPU cores count performance boost
• Added new compress param - threads
• Update README - added module API description

Version 1.4.4.0

Update zstd to v1.4.4

Version 1.4.3.1

• Update upstream zstd to v1.4.3