Fix/update loop gone

[ali-bahjati]

From #19

https://docs.python.org/3/library/asyncio-task.html#creating-tasks

"Save a reference to the result of this function, to avoid a task disappearing mid-execution. The event loop only keeps weak references to tasks. A task that isn’t referenced elsewhere may get garbage collected at any time, even before it’s done."

Building off the example i end up with a publisher that suddenly dies. It looks like some places violate the documentation recommendations.