new: [stix2 export] Parsing relationships between objects
new: [stix2 export] Parsing relationships between objects

- Which includes of course relationships between
  objects and objects, and the ones between
  objects and attributes

SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,FIRSTdotorg/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP