Bump puma from 3.12.2 to 3.12.3

Bumps [puma](https://github.com/puma/puma) from 3.12.2 to 3.12.3.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v3.12.2...v3.12.3)

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

Gemfile

@@ -11,7 +11,7 @@ end
 gem 'rails', '~> 5.2.0'
 
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 3.12'
 
 gem 'deprecation'
 gem 'honeybadger'

Gemfile.lock

@@ -125,7 +125,7 @@ GEM
     parallel (1.19.1)
     parser (2.7.0.2)
       ast (~> 2.4.0)
-    puma (3.12.2)
+    puma (3.12.3)
     rack (2.2.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -238,7 +238,7 @@ DEPENDENCIES
   equivalent-xml (>= 0.6.0)
   honeybadger
   listen (~> 3.0.5)
-  puma (~> 3.0)
+  puma (~> 3.12)
   rails (~> 5.2.0)
   roo (>= 2.7.1)
   rspec-rails (~> 3.5)