Prepare v2.2.1

Signed-off-by: Sora Morimoto <[email protected]>

Author: smorimoto

CHANGELOG.md

@@ -8,6 +8,11 @@ and this project adheres to
 
 ## [unreleased]
 
+## [2.2.1]
+
+- Update runtime dependencies.
+- Adopt native ESM for runtime environment for `ocaml/setup-ocaml/analysis`.
+
 ## [2.2.0]
 
 ### Added
@@ -532,7 +537,8 @@ that require it.
 
 - Initial release.
 
-[unreleased]: https://github.com/ocaml/setup-ocaml/compare/v2.2.0...HEAD
+[unreleased]: https://github.com/ocaml/setup-ocaml/compare/v2.2.1...HEAD
+[2.2.1]: https://github.com/ocaml/setup-ocaml/compare/v2.2.0...v2.2.1
 [2.2.0]: https://github.com/ocaml/setup-ocaml/compare/v2.1.8...v2.2.0
 [2.1.8]: https://github.com/ocaml/setup-ocaml/compare/v2.1.7...v2.1.8
 [2.1.7]: https://github.com/ocaml/setup-ocaml/compare/v2.1.6...v2.1.7