Bump puma from 4.3.11 to 4.3.12

Bumps [puma](https://github.com/puma/puma) from 4.3.11 to 4.3.12.
- [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/v4.3.11...v4.3.12)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
...

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

Gemfile

@@ -43,7 +43,7 @@ gem "omniauth-twitter", "~> 1.4.0"
 gem "paranoia", "~> 2.4.3"
 gem "pg", "~> 1.2.3"
 gem "pg_search", "~> 2.3.5"
-gem "puma", "~> 4.3.11"
+gem "puma", "~> 4.3.12"
 gem "recipient_interceptor", "~> 0.3.0"
 gem "redcarpet", "~> 3.5.1"
 gem "responders", "~> 3.0.1"

Gemfile.lock

@@ -457,7 +457,7 @@ GEM
       pronto (~> 0.11.0)
       scss_lint (~> 0.43, >= 0.43.0)
     public_suffix (4.0.6)
-    puma (4.3.11)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
@@ -752,7 +752,7 @@ DEPENDENCIES
   pronto-eslint (~> 0.11.0)
   pronto-rubocop (~> 0.11.1)
   pronto-scss (~> 0.11.0)
-  puma (~> 4.3.11)
+  puma (~> 4.3.12)
   rails (= 5.2.7)
   rails-assets-leaflet!
   rails-assets-markdown-it (~> 9.0.1)!