Twilio C# Helper Library major version 6.x release

Twilio C# Helper Library major version 6.x is now available.We ensured that you can upgrade to the 6.x version without any breaking changes

Behind the scenes C# Helper is now auto-generated via OpenAPI with this release. This enables us to rapidly add new features and enhance consistency across versions and languages.

To learn more about the C# Helper Library, check out our docs.