v2.5.0

• Feature: #214 Add SSL ciphers configuration. Thanks, @c960657!
• Improvement: #227 Use GitHub Actions as CI. Require at least Ruby v2.3. Thanks, @ioquatix!
• Improvement: #213 Support Net::HTTP::Persistent v4.0 also. Thanks, @Meat-Chopper!

And, thanks @rogerleite for other work on this release!