0.9.0

Note that bundleup now requires Bundler 1.16 or newer.

⚠️ Breaking Changes

• No longer use deprecated bundle show command (#41) @mattbrictson

🏠 Housekeeping

• Upgrade CI to Bundler 2.1.3 (#42) @mattbrictson
• Update rubocop requirement to = 0.78.0 (#40) @dependabot-preview
• Update rubocop-performance requirement to = 1.5.2 (#39) @dependabot-preview
• Remove coveralls (#38) @mattbrictson
• Add Ruby 2.7.0 to CI (#37) @mattbrictson
• Fix travis build failure with ruby-head (#32) @mattbrictson
• Upgrade CI to use Ruby 2.4.9, 2.5.7, 2.6.5 (#31) @mattbrictson
• Update rake requirement from ~> 12.0 to ~> 13.0 (#30) @dependabot-preview
• Migrate to new GitHub Actions config format (#26) @mattbrictson