Bump NUnit from 3.13.0 to 3.13.1 (#1267)

Bumps [NUnit](https://github.com/nunit/nunit) from 3.13.0 to 3.13.1.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/master/CHANGES.md)
- [Commits](nunit/nunit@v3.13...v3.13.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Tests/Opc.Ua.Client.ComplexTypes.Tests/Opc.Ua.Client.ComplexTypes.Tests.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
-    <PackageReference Include="NUnit" Version="3.13.0" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit.Console" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0">
       <PrivateAssets>all</PrivateAssets>

Tests/Opc.Ua.Core.Tests/Opc.Ua.Core.Tests.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
-    <PackageReference Include="NUnit" Version="3.13.0" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit.Console" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0">
       <PrivateAssets>all</PrivateAssets>

Tests/Opc.Ua.Gds.Tests/Opc.Ua.Gds.Tests.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
-    <PackageReference Include="NUnit" Version="3.13.0" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit.Console" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0">
       <PrivateAssets>all</PrivateAssets>

Tests/Opc.Ua.PubSub.Tests/Opc.Ua.PubSub.Tests.Disabled.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
-    <PackageReference Include="NUnit" Version="3.13.0" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit.Console" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0">
       <PrivateAssets>all</PrivateAssets>

Tests/Opc.Ua.Security.Certificates.Tests/Opc.Ua.Security.Certificates.Tests.csproj

@@ -16,7 +16,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
-    <PackageReference Include="NUnit" Version="3.13.0" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit.Console" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0">
       <PrivateAssets>all</PrivateAssets>