What's Changed
* lxd: improve error messages by mr-cal in https://github.com/canonical/craft-providers/pull/161
* executor: add `is_running()` method to base Executor class by mr-cal in https://github.com/canonical/craft-providers/pull/164
* providers: add Provider, LXDProvider, and MultipassProvider classes by mr-cal in https://github.com/canonical/craft-providers/pull/163
* Bump version: 1.5.1 → 1.6.0 by mr-cal in https://github.com/canonical/craft-providers/pull/165
**Full Changelog**: https://github.com/canonical/craft-providers/compare/1.5.1...1.6.0