Bump NUnit from 3.13.1 to 3.13.2

Bumps [NUnit](https://github.com/nunit/nunit) from 3.13.1 to 3.13.2.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/v3.13.2/CHANGES.md)
- [Commits](nunit/nunit@v3.13.1...v3.13.2)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Build.props

@@ -34,7 +34,7 @@
         <PackageVersion_MicrosoftTestSdk>16.9.4</PackageVersion_MicrosoftTestSdk>
         <PackageVersion_NSubstitute>4.2.2</PackageVersion_NSubstitute>
         <PackageVersion_CoverletMsBuild>3.0.3</PackageVersion_CoverletMsBuild>
-        <PackageVersion_NUnit>3.13.1</PackageVersion_NUnit>
+        <PackageVersion_NUnit>3.13.2</PackageVersion_NUnit>
         <PackageVersion_NUnit3TestAdapter>3.17.0</PackageVersion_NUnit3TestAdapter>
         <PackageVersion_NunitXmlTestLogger>3.0.97</PackageVersion_NunitXmlTestLogger>
         <PackageVersion_Shouldly>4.0.3</PackageVersion_Shouldly>