Bump rake from 13.0.6 to 13.1.0

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>

Gemfile.lock

@@ -77,7 +77,7 @@ GEM
       rack (~> 2.2, >= 2.2.4)
     rack-test (2.1.0)
       rack (>= 1.3)
-    rake (13.0.6)
+    rake (13.1.0)
     rbtree (0.4.6)
     redis (4.6.0)
     redis-objects (1.7.0)