Build(deps): Bump regexp_parser from 2.2.0 to 2.2.1 (#15923)

Bumps [regexp_parser](https://github.com/ammar/regexp_parser) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/ammar/regexp_parser/releases)
- [Changelog](https://github.com/ammar/regexp_parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ammar/regexp_parser/compare/v2.2.0...v2.2.1)

---
updated-dependencies:
- dependency-name: regexp_parser
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -354,7 +354,7 @@ GEM
     redis (4.5.1)
     redis-namespace (1.8.1)
       redis (>= 3.0.4)
-    regexp_parser (2.2.0)
+    regexp_parser (2.2.1)
     request_store (1.5.1)
       rack (>= 1.4)
     rexml (3.2.5)