Bump puma from 3.12.1 to 3.12.2

Bumps [puma](https://github.com/puma/puma) from 3.12.1 to 3.12.2.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v3.12.1...v3.12.2)

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

Author: dependabot[bot]

Gemfile.lock

@@ -147,7 +147,7 @@ GEM
       rack (>= 1.6.2, < 3)
     orm_adapter (0.5.0)
     public_suffix (4.0.1)
-    puma (3.12.1)
+    puma (3.12.2)
     rack (2.0.8)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)