0.1.19 New Integrations

Many new integrations, special thanks to the awesome @lmirosevic for providing the new integrations 🚀

• Added add_git_tag to automatically tag your git repository
• Added commit_version_bump to commit the version bump
• Added clean_build_artifacts to clean up the temporary files of sigh and the other tools
• Added ensure_git_status_clean to make sure the repository doesn't have any un-committed changes
• Added reset_git_repo to reset the git repository after the fastlane run
• Added resign action to code sign an existing ipa file
• Added support for passing the notification setting to the Crashlytics integration
• Added support for custom notes for the typetalk integration (thanks @dataich)
• A lot of changes under the hood to work better with the recent sigh and cert releases