Update bullet 5.2.0 -> 5.5.1

Gemfile

@@ -260,7 +260,7 @@ group :development do
   gem 'brakeman', '~> 3.6.0', require: false
 
   gem 'letter_opener_web', '~> 1.3.0'
-  gem 'bullet', '~> 5.2.0', require: false
+  gem 'bullet', '~> 5.5.0', require: false
   gem 'rblineprof', '~> 0.3.6', platform: :mri, require: false
 
   # Better errors handler

Gemfile.lock

@@ -88,7 +88,7 @@ GEM
     brakeman (3.6.1)
     browser (2.2.0)
     builder (3.2.3)
-    bullet (5.2.0)
+    bullet (5.5.1)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.10.0)
     bundler-audit (0.5.0)
@@ -855,7 +855,7 @@ DEPENDENCIES
   bootstrap-sass (~> 3.3.0)
   brakeman (~> 3.6.0)
   browser (~> 2.2)
-  bullet (~> 5.2.0)
+  bullet (~> 5.5.0)
   bundler-audit (~> 0.5.0)
   capybara (~> 2.6.2)
   capybara-screenshot (~> 1.0.0)