• [Breaking] Bump minimum Rust version to 1.46.0
• [Bugfix] Avoid many panics that may occur on broken files
• [Bugfix] Fix race condition that may cause tests to fail
• [Performance] Optimizations to unfiltering and copying
• [Feature] Add --ng option to skip grayscale reduction
• [Feature] Also preserve timestamps when using --preserve
• [Misc] Bump crc to 2.x