Bump puma from 3.12.0 to 3.12.2

Bumps [puma](https://github.com/puma/puma) from 3.12.0 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@v3.12.0...v3.12.2)

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

Gemfile

@@ -19,7 +19,7 @@ gem 'pco_api'
 # Use postgres as the database for Active Record
 gem 'pg', '~> 1.0.0'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 3.12'
 
 gem 'rails', '~> 5.1.5'
 

Gemfile.lock

@@ -146,7 +146,7 @@ GEM
     powerpack (0.1.2)
     psych (3.1.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.2)
     rack (2.0.6)
     rack-proxy (0.6.5)
       rack
@@ -263,7 +263,7 @@ DEPENDENCIES
   omniauth-oauth2
   pco_api
   pg (~> 1.0.0)
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.5)
   react-rails
   rubocop