Bump regexp_parser from 2.8.3 to 2.9.0 (#484)

Bumps [regexp_parser](https://github.com/ammar/regexp_parser) from 2.8.3 to 2.9.0.
- [Changelog](https://github.com/ammar/regexp_parser/blob/master/CHANGELOG.md)
- [Commits](ammar/regexp_parser@v2.8.3...v2.9.0)

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

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

Gemfile.lock

@@ -40,7 +40,7 @@ GEM
     racc (1.7.3)
     rainbow (3.1.1)
     rake (13.1.0)
-    regexp_parser (2.8.3)
+    regexp_parser (2.9.0)
     rexml (3.2.6)
     rmagick (5.3.0)
       pkg-config (~> 1.4)