Upgrade Bullet from 5.0.0 to 5.2.0.

Removes methods that were deprecated in Rails 5.

Changelog: https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md#520

Gemfile

@@ -252,7 +252,7 @@ group :development do
   gem 'letter_opener_web', '~> 1.3.0'
   gem 'rerun', '~> 0.11.0'
-  gem 'bullet', '~> 5.0.0', require: false
+  gem 'bullet', '~> 5.2.0', require: false
   gem 'rblineprof', '~> 0.3.6', platform: :mri, require: false
   gem 'web-console', '~> 2.0'

Gemfile.lock

@@ -100,9 +100,9 @@ GEM
     brakeman (3.3.2)
     browser (2.2.0)
     builder (3.2.2)
-    bullet (5.0.0)
+    bullet (5.2.0)
       activesupport (>= 3.0.0)
-      uniform_notifier (~> 1.9.0)
+      uniform_notifier (~> 1.10.0)
     bundler-audit (0.5.0)
       bundler (~> 1.2)
       thor (~> 0.18)
@@ -766,7 +766,7 @@ GEM
     unicorn-worker-killer (0.4.4)
       get_process_mem (~> 0)
       unicorn (>= 4, < 6)
-    uniform_notifier (1.9.0)
+    uniform_notifier (1.10.0)
     uuid (2.3.8)
       macaddr (~> 1.0)
     version_sorter (2.0.0)
@@ -821,7 +821,7 @@ DEPENDENCIES
   bootstrap-sass (~> 3.3.0)
   brakeman (~> 3.3.0)
   browser (~> 2.2)
-  bullet (~> 5.0.0)
+  bullet (~> 5.2.0)
   bundler-audit (~> 0.5.0)
   byebug (~> 8.2.1)
   capybara (~> 2.6.2)