Implement RFC 7967 (No Server Response Option) #303
Description
RFC 7967 adds a "No Server Response" option to CoAP which is currently not supported by node-coap. The option allows clients to express that they are not interested in certain responses by the server, suppressing, for example, responses with a success code (2.xx) to frequent updates using the POST requests.
Compared to other RFCs, it should be relatively easy to implement (famous last words 😉).