Version 2.2.1

New features

• feat: add validity error for duplicate record field by @agoose77 in #2447
• feat: add empty_if_typetracer & expose more of typetracer to L2 by @agoose77 in #2127
• feat!: remove use of typestr in ak.types.Type by @agoose77 in #2454
• feat: improve performance of behavior lookups by @agoose77 in #2464
• feat: support record reducer overloads by @agoose77 in #2458

Bug-fixes and performance

• fix: ak.to_numpy does not properly convert lists of empty string by @agoose77 in #2449
• fix: handle indexed nodes in ak.almost_equal by @agoose77 in #2460

Other

• ci: annotate pytest failures on GHA by @agoose77 in #2448
• chore: update pre-commit hooks by @pre-commit-ci in #2461
• docs: update contributing guide by @agoose77 in #2453
• refactor: reorganise sentinel definitions by @agoose77 in #2459

Full Changelog: v2.2.0...v2.2.1