What's Changed
* Remove formatting from non-interactive output by emdoyle in https://github.com/gauge-sh/tach/pull/681
* Move all user-facing messages in CLI to stderr by emdoyle in https://github.com/gauge-sh/tach/pull/682
* Add `depends_on_external`, `cannot_depend_on_external` to control external dependencies by emdoyle in https://github.com/gauge-sh/tach/pull/683
**Full Changelog**: https://github.com/gauge-sh/tach/compare/v0.27.3...v0.28.0