Maintenance release

What's Changed

• Bump Octokit from 11.0.0 to 11.0.1 by @dependabot in #567
• Bump ReactiveUI from 19.6.1 to 19.6.12 by @dependabot in #572
• Bump xunit from 2.7.0 to 2.8.0 by @dependabot in #570
• Bump ReactiveUI.WPF and ReactiveUI by @dependabot in #575
• Bump ReactiveUI.Testing and ReactiveUI by @dependabot in #578
• Bump Microsoft.NET.Test.Sdk from 17.9.0 to 17.10.0 by @dependabot in #580
• Bump xunit.runner.visualstudio from 2.5.7 to 2.8.1 by @dependabot in #581

Full Changelog: v2.12.9...v2.12.10