Release v2.0.0

What's Changed

• Jira: Checking task status & OpenAI: Invite via link by @deimosowen in #112
• Calendar: Use authuser by @deimosowen in #114
• Calendar: Set status in mattermost by @deimosowen in #116
• Mattermost client: Fetch with retry by @deimosowen in #119
• Long opening invite page by @deimosowen in #122
• Invite: Inactive Channels by @deimosowen in #124
• Duty: Add/Remove/Order by @deimosowen in #126

Full Changelog: v1.18.11...v2.0.0