Display dropped packet stats

[arctic-alpaca]

Is your feature request related to a problem? Please describe.
Packets might get dropped if sniffnet cannot handle them fast enough. As far as I can tell, the amount of dropped packets is currently not displayed anywhere.

Describe the solution you'd like
Some form of information about dropped packets.

Describe alternatives you've considered
I'm not sure whether there are alternatives to get this information.

Additional context
The pcap crate provides information about captures via the stats() function. As the docs state, this information can be limited as described here: https://www.tcpdump.org/manpages/pcap_stats.3pcap.html

[GyulyVGC]

Thanks for having pointed out, I'll add this feature in the next major release!

[GyulyVGC]

A new release including dropped packets number has just been published!