1.2.0 Preview 1

What's Changed

• Explore session change notifications for Blazor by @leastprivilege in #67
• Update BFF middleware marker by @leastprivilege in #76
• Add YARP antiforgery middleware by @leastprivilege in #74
• Add nullable annotations by @leastprivilege in #77
• Update YARP extensions by @leastprivilege in #78
• Remove conditional compilation for JSON serializer by @leastprivilege in #83
• Make default endpoint implementations more derivation friendly by @leastprivilege in #82
• Add lightweight checksession / login check by @brockallen in #80

Full Changelog: 1.1.3...1.2.0-preview.1