build(deps): bump xunit from 2.6.0 to 2.6.1 (#41)

Author: dependabot[bot]

Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="NetEvolve.Extensions.XUnit" Version="1.1.95" />
     <PackageVersion Include="Polyfill" Version="1.29.0" />
     <PackageVersion Include="Verify.Xunit" Version="22.1.4" />
-    <PackageVersion Include="xunit" Version="2.6.0" />
+    <PackageVersion Include="xunit" Version="2.6.1" />
     <PackageVersion Include="xunit.core" Version="2.6.1" />
     <PackageVersion Include="xunit.runner.console" Version="2.6.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.4.5" />