Bump racc from 1.8.0 to 1.8.1

Bumps [racc](https://github.com/ruby/racc) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/ruby/racc/releases)
- [Changelog](https://github.com/ruby/racc/blob/master/ChangeLog)
- [Commits](ruby/racc@v1.8.0...v1.8.1)

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

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

Gemfile.lock

@@ -27,7 +27,7 @@ GEM
     pry-byebug (3.10.1)
       byebug (~> 11.0)
       pry (>= 0.13, < 0.15)
-    racc (1.8.0)
+    racc (1.8.1)
     rake (13.2.1)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)