Breaking

• None.

Experimental

• None.

Enhancements

• Update Rule list documentation to distinguish between opt-in and on-by-default rules.
  Benny Wong

• Add opt-in prefer_self_in_static_references rule to warn if the type name is used to reference static members the same type. Prefer using Self instead which is not affected by renamings.
  SimplyDanny

• Add support for running SwiftLint as a pre-commit hook.
  Jesse Crocker Hannes Ljungberg

Bug Fixes

• Fix unused_import rule incorrectly considering SwiftShims as a used import.
  JP Simard

• Fix false positives on large_tuple rule when using async closures.
  Kaitlin Mahar #3753

• Fix false positive on legacy_objc_type rule when using types with names that start with a legacy type name.
  Isaac Ressler #3555