LZ4 v1.9.4

About

This is an update of liblz4 (cloned from https://github.com/lz4/lz4/releases/tag/v1.9.4)

Changes

• Update recursive makefile to v9
• Update GH Actions to use updated dependencies
• Update LZ4 to 1.9.4

Full Changelog: v1.8.2...v1.9.4