1.5.14

• python_virtualenv_constants: update virtualenv to 15.2.0 (@ilovezfs)
• Remove config/doctor checks we no longer need (@MikeMcQuaid)
• keg: delete bad tap opt non-symlink directories. (@MikeMcQuaid)
• Remove mentions to official taps (@MikeMcQuaid)
• Address some usability issues. (@MikeMcQuaid)
• Use TapPathLoader in more cases. (@reitermarkus)
• Update to RuboCop 0.54 (@reitermarkus)
• cmd/leaves: handle missing formulae. (@MikeMcQuaid)
• cli_parser: Add :quiet, :verbose, :debug common switches (@GauthamGoli)
• audit: Fix dependency order with multiple tags (@kabel)
• cask audit_spec: rspec auto-corrects (@commitay)