5.3.0 (2018-03-09):

• Bugfix: Allow paperclip to load in IRB (https://github.com/thoughtbot/paperclip/pull/2369)
• Bugfix: MIME type detection (https://github.com/thoughtbot/paperclip/issues/2527)
• Bugfix: Bad tempfile state after symlink failure (https://github.com/thoughtbot/paperclip/pull/2540)
• Bugfix: Rewind file after Fog bucket creation (https://github.com/thoughtbot/paperclip/pull/2572)
• Improvement: Use FactoryBot instead of FactoryGirl (https://github.com/thoughtbot/paperclip/pull/2501)
• Improvement: README updates (https://github.com/thoughtbot/paperclip/pull/2411, https://github.com/thoughtbot/paperclip/pull/2433, https://github.com/thoughtbot/paperclip/pull/2374, https://github.com/thoughtbot/paperclip/pull/2417, https://github.com/thoughtbot/paperclip/pull/2536)
• Improvement: Remove Ruby 2.4 deprecation warning (https://github.com/thoughtbot/paperclip/pull/2401)
• Improvement: Rails 5 migration compatibility (https://github.com/thoughtbot/paperclip/pull/2470)
• Improvement: Documentation around post processing (https://github.com/thoughtbot/paperclip/pull/2381)
• Improvement: S3 hostname example documentation (https://github.com/thoughtbot/paperclip/pull/2379)
• Improvement: Use Terrapin instead of Cocaine (https://github.com/thoughtbot/paperclip/pull/2553)