plugin XEP-0277: various fixes + async: - `NS_ATOM` is now set at class level, so it can be accessed by other plugins - set `author` to `None` when no `name` element is found - make `data2entry` a corountine - fix incorrect use of yield in `trigger.point`

version: "3.6"
services:

  prosody:
    image: libervia/prosody:demo
    build: prosody-demo

  backend:
    image: libervia/backend:dev-demo
    build: backend-dev-demo

  web:
    image: libervia/web:dev-demo
    build: libervia-web-dev-demo