Deps: Bump the microsoft-packages group with 1 update (#96)

Bumps 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
  dependency-group: microsoft-packages
...

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

Author: dependabot[bot]

tests/SharpSync.Tests/SharpSync.Tests.csproj

@@ -17,7 +17,7 @@
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="8.10.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="Xunit.SkippableFact" Version="1.5.61" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">