octodns-sync v2.1.3

Added

• (#36) Save octodns-sync plan output to a file.
• (#36) Add octodns-sync plan output to a pull request comment.
• (#37) Add dockerfile_lint to Lint Code Base workflow.
• (#37) Add labels to container image: name, version, maintainer.

Changed

• (#30, #32) Improve the administrative release workflow to facilitate consistent releasing.

Fixed

• (#34) Deleted the v99 and v99.0.0 tags.
• (#40) Exit 1 when octodns-sync exits non-zero.