* Add support for service labels with --label or -l
* Add tests
* Fix typo
* Move MapToArray helper method to separate file
* Allow unsetting labels by passing empty value
* Fix test
* Add test case for label removal
* Wrap error message with flag
* Update docs to include --label
* Update labels on both services and revisions
* Add some test cases around weirder user input
* Change unset behavior and allow setting empty env and label
* Update docs for new unset behavior
* Make single keys to map to empty values
* Move helper to util
* Use assert.DeepEqual
* Use new mock test + check both service and revision
* Use new method and correct year
Aaron Lerner