Node-red-node-ping - Add options for IPv4/IPv6 selection

All sounds sensible steps so far, keeping them separate is sensible as the target can be a list so trying to handle different per each would be a pain..
Status maybe, but again how would you handle a list of targets ? So maybe not.. But by all means set the label to ping6 if appropriate.
We can get translations done when you raise the PR as it will be easy to see the missing fields... Or indeed add them to the other locales in English to make them obvious..