Getting info of a Chat with no members throws an error

[mmacfadden]

Versions
Please fill in all that apply:

• Convergence Version: 1.0.0-rc.5

Describe the Bug
When getting the chat info of a chat that has no members an error is thrown:

TypeError: Cannot read property 'map' of undefined
    at createChatInfo (convergence.esm.js:16379)
    at convergence.esm.js:16916
    at async onDomainConnect (user-utils.ts:37)

This occurs in the createChatInfo method because we are not checking for the protobuf default array value.

Step To Reproduce
A code snippet or gist to reproduce the issue will greatly improve our response time

1. Create a chat channel called "general" with no members.
2. From the client domain.chat().get("general");

Expected Behavior
This should return a chat object with no members.