Release 2.2.2

• feat: add tests (598c3e4)
• fix(pathlib): normalize file URI conversion on Windows (61860af)
• fix(cancellation): clean up registrations and external listeners (22edd10)
• fix(cancellation): pass a real token in cancellable wrapper (1b1f2cd)
• fix(cancellation): make CancellationToken.None immutable (973b374)
• fix(cancellation): unlink linked registrations to avoid dispose race (776a6cd)
• perf(pathlib): speed up walk using dirents and symlink-safe recursion (2a77aa3)
• perf(cancellation): clear delay timer on cancellation (478cc7c)
• perf(pathlib): stream file lines instead of loading into memory (7220368)
• chore: update dependencies (caad025)