coap: update defines for rfc8132
coap: update defines for rfc8132

Update the list of defines for methods and response codes with the new
codes as defined in [rfc8132](https://tools.ietf.org/html/rfc8132)

basilfx/RIOT,jasonatran/RIOT,kYc0o/RIOT,miri64/RIOT,aeneby/RIOT,cladmi/RIOT,aeneby/RIOT,authmillenon/RIOT,cladmi/RIOT,authmillenon/RIOT,ant9000/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,cladmi/RIOT,ant9000/RIOT,OTAkeys/RIOT,aeneby/RIOT,smlng/RIOT,yogo1212/RIOT,OlegHahm/RIOT,josephnoir/RIOT,rfuentess/RIOT,ant9000/RIOT,basilfx/RIOT,mtausig/RIOT,toonst/RIOT,rfuentess/RIOT,cladmi/RIOT,smlng/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,authmillenon/RIOT,miri64/RIOT,x3ro/RIOT,toonst/RIOT,miri64/RIOT,mtausig/RIOT,kYc0o/RIOT,kYc0o/RIOT,miri64/RIOT,OTAkeys/RIOT,smlng/RIOT,smlng/RIOT,josephnoir/RIOT,yogo1212/RIOT,toonst/RIOT,kaspar030/RIOT,josephnoir/RIOT,rfuentess/RIOT,jasonatran/RIOT,yogo1212/RIOT,jasonatran/RIOT,kYc0o/RIOT,rfuentess/RIOT,OlegHahm/RIOT,mtausig/RIOT,toonst/RIOT,kaspar030/RIOT,smlng/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,jasonatran/RIOT,x3ro/RIOT,aeneby/RIOT,yogo1212/RIOT,mtausig/RIOT,toonst/RIOT,RIOT-OS/RIOT,x3ro/RIOT,kaspar030/RIOT,OTAkeys/RIOT,basilfx/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,yogo1212/RIOT,ant9000/RIOT,kaspar030/RIOT,basilfx/RIOT,OlegHahm/RIOT,miri64/RIOT,mtausig/RIOT,x3ro/RIOT,josephnoir/RIOT,josephnoir/RIOT,kaspar030/RIOT,OlegHahm/RIOT,x3ro/RIOT,aeneby/RIOT,authmillenon/RIOT,basilfx/RIOT,ant9000/RIOT,authmillenon/RIOT,cladmi/RIOT,rfuentess/RIOT,RIOT-OS/RIOT