1.64.0 Improvements

• Added get_build_number_repository action to get the build number from SCM
• Upgraded gradle action to support flavor, build_type, and gradle properties
• Reworked verify_build to use 'ApplicationIdentifierPrefix' to verify the proper bundle identifier
• Added oclint_path option to oclint action
• Fixed s3 action error with undefined method 'public_url'
• Added custom template loading to mailgun action
• Added new parameters to badge action
• Added support for 'initial_build_number' to latest_testflight_build_number action
• Added update_icloud_container_identifiers action to change iCloud container identifiers.