v0.3.0

What's changed

• feat: e2e testing by @fmartingr in #75
• feat: import Slack bot users as Mattermost bot accounts by @fmartingr in #79
• fix: ensure SlackConvertChannelName always returns lowercase channel names by @fmartingr in #80

Full Changelog: v0.2.1...v0.3.0