- Let box_id start with char for valid HTML.
- No need to use SHA1 for box id
- No need for the user_id attribute.
- Set nickname when we set the roster contact.
Also...
- _converse.api.contacts.get is now async
- _converse.api.chats.create is now async
- Combine all test init functions into `initConverse`
- Use `async` functions in more tests
- Replace `var` with `let` and `const` in more tests
- New utils method `toStanza` which converts a string to a Node