Upgrade database_cleaner from 1.4.1 to 1.5.3.

This includes support for Rails 5 without deprecations warnings.

Changelog: https://github.com/DatabaseCleaner/database_cleaner/blob/master/History.rdoc#153-2016-04-22

Gemfile

@@ -275,7 +275,7 @@ group :development, :test do
   gem 'awesome_print', '~> 1.2.0', require: false
   gem 'fuubar', '~> 2.0.0'
 
-  gem 'database_cleaner',   '~> 1.4.0'
+  gem 'database_cleaner',   '~> 1.5.0'
   gem 'factory_girl_rails', '~> 4.6.0'
   gem 'rspec-rails',        '~> 3.5.0'
   gem 'rspec-retry',        '~> 0.4.5'

Gemfile.lock

@@ -153,7 +153,7 @@ GEM
     d3_rails (3.5.11)
       railties (>= 3.1.0)
     daemons (1.2.3)
-    database_cleaner (1.4.1)
+    database_cleaner (1.5.3)
     debug_inspector (0.0.2)
     debugger-ruby_core_source (1.3.8)
     default_value_for (3.0.1)
@@ -841,7 +841,7 @@ DEPENDENCIES
   connection_pool (~> 2.0)
   creole (~> 0.5.0)
   d3_rails (~> 3.5.0)
-  database_cleaner (~> 1.4.0)
+  database_cleaner (~> 1.5.0)
   default_value_for (~> 3.0.0)
   devise (~> 4.0)
   devise-two-factor (~> 3.0.0)