Report errors

[tomasjakubik]

Add hooks for errors

• CAN controller errors via socketcan
• when dropping a Tx frame

[coveralls]

coverage: 93.408% (-0.4%) from 93.785%
when pulling 9f0b95a on tomasjakubik:report-errors
into 9c97bd1 on OpenCyphal:master.

[tomasjakubik]

@pavel-kirienko Please have a look when you have time.
I am not sure that the hook/callback architecture is the way to go, so feel free to suggest something better.
I don't like the coverage decrease, but I am not sure if we can test this code reasonably without hardware 🤷.

Those two fixes for libpcap and SOL_CAN_RAW might probably go to a minor patch version if needed.
edit: Libcap was fixed and the commit dropped.

[tomasjakubik]

I think the missing setuptools came from the updated libpcap which changed the dependency.

As for the missing bpf_program it is probably also linked with changes in libpcap. I am looking into it.