1.0.3

Xero OAuth 2.0 OmniAuth Strategy version 1.0.3 release.

Fixes a breaking change in Omniauth 2

• https://github.com/omniauth/omniauth/wiki/Upgrading-to-2.0#relative-root-apps
• omniauth/omniauth#903

Repository Cleanup:

• Removed Gemfile.lock
• Removed previously packaged gems
• Fix up version.rb to always match gemspec

Special thanks to @whithajess 🎉