build(deps): bump System.Reflection.TypeExtensions from 4.6.0 to 4.7.0

Bumps [System.Reflection.TypeExtensions](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>

src/Splat.Log4Net/Splat.Log4Net.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="System.Net.Sockets" Version="4.3.0" />
     <PackageReference Include="System.Reflection" Version="4.3.0" />
     <PackageReference Include="System.Reflection.Extensions" Version="4.3.0" />
-    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.6.0" />
+    <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />
     <PackageReference Include="System.Runtime.Extensions" Version="4.3.1" />
     <PackageReference Include="System.Runtime.InteropServices" Version="4.3.0" />
     <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0" />