Bump puma from 4.3.3 to 4.3.4

Bumps [puma](https://github.com/puma/puma) from 4.3.3 to 4.3.4.
- [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/v4.3.3...v4.3.4)

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

Gemfile.lock

@@ -224,7 +224,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.5)
-    puma (4.3.3)
+    puma (4.3.4)
       nio4r (~> 2.0)
     pundit (2.1.0)
       activesupport (>= 3.0.0)