Bump rake from 13.0.6 to 13.1.0 (#460)

Bumps [rake](https://github.com/ruby/rake) from 13.0.6 to 13.1.0.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v13.0.6...v13.1.0)

---
updated-dependencies:
- dependency-name: rake
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -39,7 +39,7 @@ GEM
     pkg-config (1.5.5)
     racc (1.7.1)
     rainbow (3.1.1)
-    rake (13.0.6)
+    rake (13.1.0)
     regexp_parser (2.8.2)
     rexml (3.2.6)
     rmagick (5.3.0)