Version 1.5.1.0

• update libzstd to 1.5.1 - follow upstream
• fix passing VERSION string to compiler, thanks to @hoffmang9

Version 1.5.0.4

Same as 1.5.0.3, but tests are fixed: update all version strings

Version 1.5.0.3

Compatibility with python 3.8 - 3.11 (@vstinner)

BROKEN TESTS

Version 1.5.0.2

• simplify tests
• add new function for them: ZSTD_external(): 0/1

Version 1.5.0.1

• fix build - missing new file: zstd_errors.h

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