Build(deps): Bump regexp_parser from 1.8.0 to 1.8.1 (#10767)

Bumps [regexp_parser](https://github.com/ammar/regexp_parser) from 1.8.0 to 1.8.1.
- [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/v1.8.0...v1.8.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile.lock

@@ -303,7 +303,7 @@ GEM
     redis (4.2.2)
     redis-namespace (1.8.0)
       redis (>= 3.0.4)
-    regexp_parser (1.8.0)
+    regexp_parser (1.8.1)
     request_store (1.5.0)
       rack (>= 1.4)
     rexml (3.2.4)