Bump rouge from 4.1.3 to 4.2.0

Bumps [rouge](https://github.com/rouge-ruby/rouge) from 4.1.3 to 4.2.0.
- [Release notes](https://github.com/rouge-ruby/rouge/releases)
- [Changelog](https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md)
- [Commits](rouge-ruby/rouge@v4.1.3...v4.2.0)

---
updated-dependencies:
- dependency-name: rouge
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -7,7 +7,7 @@ GEM
     prettier_print (1.2.1)
     rake (13.0.6)
     rexml (3.2.5)
-    rouge (4.1.3)
+    rouge (4.2.0)
     syntax_tree (6.2.0)
       prettier_print (>= 1.2.0)
     test-unit (3.6.1)