Update NUnit requirement from 3.13.* to 3.14.*

Updates the requirements on [NUnit](https://github.com/nunit/nunit) to permit the latest version.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/master/CHANGES.md)
- [Commits](nunit/nunit@v3.13...v3.14.0)

---
updated-dependencies:
- dependency-name: NUnit
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/SampleApps/SampleApp.Classic.Tests/SampleApp.Classic.Tests.csproj

@@ -14,7 +14,7 @@
 	<ItemGroup>
 		<PackageReference Include="coverlet.msbuild" Version="6.0.*" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.*" />
-		<PackageReference Include="NUnit" Version="3.13.*" />
+		<PackageReference Include="NUnit" Version="3.14.*" />
 		<PackageReference Include="NUnit3TestAdapter" Version="4.5.*" />
 		<PackageReference Include="Moq" Version="4.20.*" />
 	</ItemGroup>

src/Simplify.Web.RegistrationsTests/Simplify.Web.RegistrationsTests.csproj

@@ -16,7 +16,7 @@
 		</PackageReference>
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.*" />
 		<PackageReference Include="Moq" Version="4.20.*" />
-		<PackageReference Include="NUnit" Version="3.13.*" />
+		<PackageReference Include="NUnit" Version="3.14.*" />
 		<PackageReference Include="NUnit3TestAdapter" Version="4.5.*" />
 	</ItemGroup>
 	<ItemGroup>

src/Simplify.Web.Tests/Simplify.Web.Tests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
 		<TargetFramework>net7.0</TargetFramework>
 		<Nullable>enable</Nullable>
@@ -16,7 +16,7 @@
 		</PackageReference>
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.*" />
 		<PackageReference Include="Moq" Version="4.20.*" />
-		<PackageReference Include="NUnit" Version="3.13.*" />
+		<PackageReference Include="NUnit" Version="3.14.*" />
 		<PackageReference Include="NUnit3TestAdapter" Version="4.5.*" />
 		<PackageReference Include="Simplify.Xml" Version="1.3.*" />
 	</ItemGroup>