Interface not necessarily on wlp58s0

[randyzwitch]

For my laptop running Ubuntu 18.04 LTS, my network interface is actually wlp59s0 https://github.com/alessandrobessi/pytelemetry/blob/master/pytelemetry/listen.py#L37

Haven't thought too much about the robustness of this (I'm just getting started trying this package), but something like [x for x in ni.interfaces() if 'wlp' in x][0] would fix this for my case while (presumably) making your interface id work as well.