Bump rake from 13.3.0 to 13.3.1 (#361)

Bumps [rake](https://github.com/ruby/rake) from 13.3.0 to 13.3.1.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v13.3.0...v13.3.1)

---
updated-dependencies:
- dependency-name: rake
  dependency-version: 13.3.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -66,7 +66,7 @@ GEM
     rack-test (2.2.0)
       rack (>= 1.3)
     raindrops (0.20.1)
-    rake (13.3.0)
+    rake (13.3.1)
     redis (4.8.1)
     redis-namespace (1.11.0)
       redis (>= 4)