1.4.7

Changes:

• 0ea848e Fix ReactiveValidationObject concurrency issues (#54) @worldbeater
• 433f19e build(deps): update ReactiveUI requirement from 10.* to 11.* (#52)
• 78e59a0 build(deps): bump Nerdbank.GitVersioning from 3.0.25 to 3.0.28 (#48)
• dafb4d3 build(deps): bump Microsoft.SourceLink.GitHub (#49)
• cac8207 build(deps): bump Microsoft.NET.Test.Sdk from 16.3.0 to 16.4.0 (#47)
• 6603d3d Housekeeping: Update MSBuild.Sdk.Extras (#53) @glennawatson