Update dependency Microsoft.NET.Test.Sdk to 18.7.0 (#1218)

Co-authored-by: dependencyupdates[bot] <218638057+dependencyupdates[bot]@users.noreply.github.com>

Author: dependencyupdates[bot]

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="GitHubActionsTestLogger" Version="3.0.4" />
     <PackageVersion Include="ICSharpCode.Decompiler" Version="8.2.0.7535" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="5.2.3" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
     <PackageVersion Include="Mindscape.Raygun4Net.AspNetCore" Version="11.2.5" />
     <PackageVersion Include="Npgsql" Version="9.0.5" />
     <PackageVersion Include="NuGet.Versioning" Version="6.14.3" />