Bump Microsoft.CSharp from 4.6.0 to 4.7.0 (#1127)

Bumps [Microsoft.CSharp](https://github.com/dotnet/corefx) from 4.6.0 to 4.7.0.
- [Release notes](https://github.com/dotnet/corefx/releases)
- [Commits](https://github.com/dotnet/corefx/commits)

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

Author: dependabot-preview[bot]

src/PowerShellEditorServices/PowerShellEditorServices.csproj

@@ -27,7 +27,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CSharp" Version="4.6.0" />
+    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.Extensions.FileSystemGlobbing" Version="3.0.1" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="3.0.1" />
     <PackageReference Include="OmniSharp.Extensions.LanguageServer" Version="0.14.0" />