Release 4.7.0 (#463)

- Adds Compatibility with .NET 4.5 using Newtonsoft.Json 12.0.3 and retain 13.0.3 for newer frameworks
- Improves OAuth Handling and Validation
- Updates LocalType to nullable
- Fixes default value in Payment Type
- Fixes Handle NoContent and null response in DeserializeResponseAsync

Author: armando-rodriguez-cko

Directory.Build.props

@@ -1,5 +1,5 @@
 <Project>
     <PropertyGroup>
-        <Version>4.6.0</Version>
+        <Version>4.7.0</Version>
     </PropertyGroup>
 </Project>