Bump puma from 5.6.5 to 6.0.0

Bumps [puma](https://github.com/puma/puma) from 5.6.5 to 6.0.0.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](https://github.com/puma/puma/compare/v5.6.5...v6.0.0)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -178,7 +178,7 @@ GEM
     parser (3.1.2.1)
       ast (~> 2.4.1)
     pg (1.4.4)
-    puma (5.6.5)
+    puma (6.0.0)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.4)
@@ -351,7 +351,7 @@ DEPENDENCIES
   mocha
   mysql2 (~> 0.5.4)
   pg (~> 1.4.4)
-  puma (~> 5.6)
+  puma (~> 6.0)
   rack-mini-profiler
   rails (~> 6.0.0)
   rails-controller-testing