Bump minitest-focus from 1.3.1 to 1.4.0 (#306)

Bumps [minitest-focus](https://github.com/seattlerb/minitest-focus) from 1.3.1 to 1.4.0.
- [Changelog](https://github.com/minitest/minitest-focus/blob/master/History.rdoc)
- [Commits](https://github.com/seattlerb/minitest-focus/commits)

---
updated-dependencies:
- dependency-name: minitest-focus
  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

@@ -237,7 +237,7 @@ GEM
     mime-types-data (3.2022.0105)
     mini_mime (1.1.2)
     minitest (5.18.1)
-    minitest-focus (1.3.1)
+    minitest-focus (1.4.0)
       minitest (>= 4, < 6)
     minitest-retry (0.2.2)
       minitest (>= 5.0)