Sync changelog

Author: Earlopain

CHANGELOG.md

@@ -19,6 +19,15 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 - Fixed location of opening tokens when invalid syntax is parsed.
 - Fix RBI for parsing options.
 
+## [1.8.1] - 2026-03-16 (Ruby 4.0.2 maintenance release)
+
+### Changed
+
+- Fix `not` binding power in endless methods.
+- Correctly handle `and?` and similar on Ruby 4.0.
+- Fix error message for block/lambda with `...` argument.
+- Fix `in` handling.
+
 ## [1.8.0] - 2026-01-12
 
 ### Added