bump puma

Gemfile

@@ -253,7 +253,7 @@ end
 group :development, :test do
   gem 'thin', '~> 1.7.2'
   gem 'ruby-prof', require: false
-  gem 'puma', '~> 3.11.3'
+  gem 'puma', '~> 3.12.0'
 
   # Tracing and profiling gems
   gem 'rack-mini-profiler', require: false

Gemfile.lock

@@ -591,7 +591,7 @@ GEM
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
     public_suffix (3.0.3)
-    puma (3.11.4)
+    puma (3.12.0)
     rabl (0.13.1)
       activesupport (>= 2.3.14)
     rack (2.0.6)
@@ -929,7 +929,7 @@ DEPENDENCIES
   pry-rails (~> 0.3.6)
   pry-rescue (~> 1.4.5)
   pry-stack_explorer (~> 0.4.9.2)
-  puma (~> 3.11.3)
+  puma (~> 3.12.0)
   rabl (~> 0.13.0)
   rack-attack (~> 5.2.0)
   rack-mini-profiler