v0.3.0-preview1

• Upgrade to ASP.NET Core 3.1 by @MarkZither (#444, #446)
• Handle offline scenarios better (#435, #448)
• UI Improvements
  • Render new lines in package description (#374)
  • Prettify dependencies (#375)
  • Prettify version list (#387)
  • Improve markdown rendering (#376)
  • Add expandable sections (#377)
  • Hide unlisted packages (#414)
  • Add release notes by @cw-pratik (#438)
• Other improvements and bug fixes (#383, #411)
  • Fix search filters by @tiksn (#418)
  • Improve database docs by @euantorano (#368)
  • Add Azure Table Storage providers (#347, #350)

Thanks @MarkZither for the huge help on upgrading BaGet to ASP.NET Core 3.1!