Bump Microsoft.Net.Compilers.Toolset from 3.6.0 to 3.7.0

Bumps [Microsoft.Net.Compilers.Toolset](https://github.com/dotnet/roslyn) from 3.6.0 to 3.7.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](https://github.com/dotnet/roslyn/commits)

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

Directory.Build.props

@@ -28,7 +28,7 @@
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.2.31" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.Net.Compilers.Toolset" Version="3.6.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.Net.Compilers.Toolset" Version="3.7.0" PrivateAssets="all" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.164" PrivateAssets="all" />
   </ItemGroup>