add: stix2-pattern type added to support the STIX 2 patterning format
add: stix2-pattern type added to support the STIX 2 patterning format

FIRSTdotorg/MISP,MISP/MISP,TheDr1ver/MISP,TheDr1ver/MISP,SteveClement/MISP,devnull-/MISP,FIRSTdotorg/MISP,Rafiot/MISP,Rafiot/MISP,devnull-/MISP,devnull-/MISP,TheDr1ver/MISP,FloatingGhost/MISP,devnull-/MISP,SteveClement/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,Rafiot/MISP,FIRSTdotorg/MISP,TheDr1ver/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,MISP/MISP,FloatingGhost/MISP,Rafiot/MISP,SteveClement/MISP,MISP/MISP,FloatingGhost/MISP,SteveClement/MISP