Bump racc from 1.7.3 to 1.8.0

Bumps [racc](https://github.com/tenderlove/racc) from 1.7.3 to 1.8.0.
- [Release notes](https://github.com/tenderlove/racc/releases)
- [Changelog](https://github.com/ruby/racc/blob/master/ChangeLog)
- [Commits](ruby/racc@v1.7.3...v1.8.0)

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

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

Gemfile.lock

@@ -57,7 +57,7 @@ GEM
       method_source (~> 1.0)
     psych (5.1.2)
       stringio
-    racc (1.7.3)
+    racc (1.8.0)
     rainbow (3.1.1)
     rake (13.2.1)
     rb-fsevent (0.11.2)