v0.4.0

What's Changed

• Switch from actions/setup-ruby to ruby/setup-ruby by @DannyBen in #16
• Drop support for Ruby < 2.6 by @DannyBen in #17
• Refactor with rubocop by @DannyBen in #18
• Refactor with rubocop (2/2) by @DannyBen in #19
• Drop support for Ruby 2.x by @DannyBen in #22
• Add ability to set cache file permissions by @DannyBen and @RulerOf in #21

Full Changelog: v0.3.3...v0.4.0