Integrated proposed fixes for _decode_field.  I guess I should have put a bit more effort into evaluating the logic to not break existing tests.  Also integrated _encode_field, which I didn't touch previously.
Integrated proposed fixes for _decode_field.  I guess I should have put a bit more effort into evaluating the logic to not break existing tests.  Also integrated _encode_field, which I didn't touch previously.

cantools/cantools,eerimoq/cantools