chore: Bump Microsoft.NET.Test.Sdk from 18.6.0 to 18.7.0 (#346)

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

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Author: dependabot[bot]

Directory.Packages.props

@@ -19,7 +19,7 @@
     <PackageVersion Include="Meziantou.Analyzer" Version="2.0.163" />
   </ItemGroup>
   <ItemGroup>
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
     <PackageVersion Include="Mono.Cecil" Version="0.11.6" />
     <PackageVersion Include="BenchmarkDotNet" Version="0.15.8" />
     <PackageVersion Include="xunit" Version="2.9.3" />