Dependabot: Bump the ruby group with 3 updates (#58)

Bumps the ruby group with 3 updates: [mustermann](https://github.com/sinatra/mustermann), [rspec-expectations](https://github.com/rspec/rspec-expectations) and [sequel](https://github.com/jeremyevans/sequel).


Updates `mustermann` from 3.0.1 to 3.0.2
- [Commits](sinatra/mustermann@v3.0.1...v3.0.2)

Updates `rspec-expectations` from 3.13.1 to 3.13.2
- [Release notes](https://github.com/rspec/rspec-expectations/releases)
- [Changelog](https://github.com/rspec/rspec-expectations/blob/main/Changelog.md)
- [Commits](rspec/rspec-expectations@v3.13.1...v3.13.2)

Updates `sequel` from 5.82.0 to 5.83.1
- [Changelog](https://github.com/jeremyevans/sequel/blob/master/CHANGELOG)
- [Commits](jeremyevans/sequel@5.82.0...5.83.1)

---
updated-dependencies:
- dependency-name: mustermann
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: ruby
- dependency-name: rspec-expectations
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: ruby
- dependency-name: sequel
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: ruby
...

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

Gemfile.lock

@@ -31,7 +31,7 @@ GEM
       sequel (>= 4.38)
     highline (3.0.1)
     method_source (1.1.0)
-    mustermann (3.0.1)
+    mustermann (3.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.7.3)
     pg (1.5.4)
@@ -59,15 +59,15 @@ GEM
       rspec-mocks (~> 3.13.0)
     rspec-core (3.13.0)
       rspec-support (~> 3.13.0)
-    rspec-expectations (3.13.1)
+    rspec-expectations (3.13.2)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-mocks (3.13.1)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.1)
     ruby2_keywords (0.0.5)
-    sequel (5.82.0)
+    sequel (5.83.1)
       bigdecimal
     sinatra (4.0.0)
       mustermann (~> 3.0)