[Parity with C#] BotAdapter UpdateActivity method signature

[gasper-az]

Is your feature request related to a problem? Please describe.
We've found some differences between the updateActivity method from BotAdapter in DotNet and JS SDK.

In the DotNet version (link here), the UpdateActivityAsync method returns a Task<ResourceResponce>, which allows us to access to the ResourceResponse properties, as its Id. However, in the JS version (link here), the method returns a Promise, which is a completely different behavior from the DotNet's implementation.

Describe the solution you'd like
Add a new implementation of the updateActivity in BotAdapter.ts which returns a Promise<ResourceResponse> for ensuring parity with the DotNet version.

Additional context
DotNet implementation:

JS implementation:

[enhancement]