v1.5.0

• Audited thread safety of the whole codebase
• Fixed threading race conditions in source and symlink
• Fixed issue where :func:remove would fail to delete directories even with
  ignore_readonly=True
• Added zstandard (zstd) compression support to open
  (requires either Python 3.14+ or the backports.zstd package)
• Added formal support for Python 3.13 and 3.14 (the previous version works fine though)
• Bumped minimum version of psutil from 5.6 to 5.7
• Handle deprecation in psutil 6