Add socket timeout

[ido-szargel]

When reading data through a device called 'chargee sparky' I noticed that every time the wireless connection of the device is lost it stops transmitting data. dsmr_parser based on the example in the README doesn't do anything and will simply sit there for hours waiting for the next telegram. Adding a 1 minute timeout and breaking allows something upstream to notice, in my case my python runs as systemd service and once it exits it's restarted.

[ndokter]

Sorry for the late response. Looks good! Ill have to make a new build in the near future