New

• Adds the Async Pattern to the Vonage SDK. All methods that were synchronous have both a sync and async flavor. To use the async method simply add Async to the end of the old method name - e.g. SendAnSmsAsync
• Adds new APIs for making Phone calls with the Voice API, specifically CreateCall has two new overloads which support either two phone numbers (to and from) and an NCCO, or a to endpoint and from number and NCCO

Fixes

• Fix enumeration issue for Verify workflows
• Some minor null checking.

https://github.com/Vonage/vonage-dotnet-sdk/releases/tag/v5.4.0