Proposal to drop old versions of Rails, CRuby and JRuby

[yahonda]

I'd like to propose dropping support for these old versions of Rails and Ruby.

Proposal:

• Drop support for Rails 4.2 or older
• Drop support for Ruby 2.1 or older
• Drop support JRuby 1.7 or older
• Drop support for JRuby 9.0.x

Current support status:

ruby-plsql has been doing great job to support wider versions of Ruby and Rails.

ruby-plsql supports Ruby 1.8.7, 1.9.3, 2.1, 2.2, 2.3, 2.4, 2.5 (ruby-oci8 2.2.3+ is needed for Ruby 2.4) and JRuby 1.6.7, 1.7.16, 9.0, 9.1 implementations.

https://github.com/rsim/ruby-plsql/tree/master/gemfiles
Active Record 4.1, 4.2, 5.0, 5.1 and 5.2 beta

As a result, test matrix becomes 50 including allowed failures. https://travis-ci.org/rsim/ruby-plsql which is quite large and causes longer CI time.

Why these software support can be dropped

Here are EOL announcements or support status updates for these software.

• Support of Ruby 2.1 has ended on April 1, 2017

• [End-of-life for JRuby 1.7.x #4112] (End-of-life for JRuby 1.7.x jruby/jruby#4112) on Nov 21, 2017

• Ruby 9.0.x is not maintained anymore

• Rails provides Security Issues for Rails 5.1 and 5.0

I'm going to open a pull request to achieve my proposal and waiting for some feedback from users and developers for a while.

[yahonda]

Closed by #146 #147 #148 #149 and #151