Bump Microsoft.NET.Test.Sdk from 18.6.0 to 18.7.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.7.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/nunit.analyzers.tests/nunit.analyzers.tests.csproj

@@ -31,7 +31,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageReference Include="Gu.Roslyn.Asserts" Version="4.3.0" />
     <PackageReference Include="Gu.Roslyn.Asserts.Analyzers" Version="4.0.0" />