[Security] Bump puma from 4.3.0 to 4.3.1

Bumps [puma](https://github.com/puma/puma) from 4.3.0 to 4.3.1. **This update includes a security fix.**
- [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/v4.3.0...v4.3.1)

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

Gemfile

@@ -39,7 +39,7 @@ gem "paperclip", "~> 5.2.1"
 gem "paranoia", "~> 2.4.2"
 gem "pg", "~> 0.21.0"
 gem "pg_search", "~> 2.0.1"
-gem "puma", "~> 4.3.0"
+gem "puma", "~> 4.3.1"
 gem "recipient_interceptor", "~> 0.2.0"
 gem "redcarpet", "~> 3.4.0"
 gem "responders", "~> 2.4.0"

Gemfile.lock

@@ -397,7 +397,7 @@ GEM
       activesupport (>= 4.2)
       arel (>= 6)
     public_suffix (4.0.1)
-    puma (4.3.0)
+    puma (4.3.1)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-accept (0.4.5)
@@ -654,7 +654,7 @@ DEPENDENCIES
   paranoia (~> 2.4.2)
   pg (~> 0.21.0)
   pg_search (~> 2.0.1)
-  puma (~> 4.3.0)
+  puma (~> 4.3.1)
   rails (= 5.0.7.2)
   rails-assets-leaflet!
   rails-assets-markdown-it (~> 8.2.1)!