v1.3.0 release - finally

Mitch v1.3.0

• You can now see your library of owned games
  • You can filter out only Android games
• Removed all mentions of the deprecated GitLab build of Mitch
• Slightly improved UI for Updates tab
• Updated screenshots in F-Droid page
• Bugfix: delete old files after install, not after download
• Minor fixes and optimizations