Bump NSubstitute from 6.0.0 to 6.1.0

---
updated-dependencies:
- dependency-name: NSubstitute
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -58,7 +58,7 @@
     <PackageVersion Include="Microsoft.Owin.Security.OpenIdConnect" Version="$(MicrosoftOwinVersion)" />
     <PackageVersion Include="Microsoft.Owin.Testing" Version="$(MicrosoftOwinVersion)" />
     <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="$(MicrosoftTestSdkVersion)" />
-    <PackageVersion Include="NSubstitute" Version="6.0.0" />
+    <PackageVersion Include="NSubstitute" Version="6.1.0" />
     <PackageVersion Include="MSBuild.Microsoft.VisualStudio.Web.targets" Version="14.0.0.3" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageVersion Include="NLog.Owin.Logging" Version="4.0.0" />