This PR updates the occurrence cubes for Belgium and for Europe by:
triggering new GBIF downloads (= more and updated data)
filtering unverified data out (filter on identificationVerificationStatus, see #24)
adding to the cube species belonging to alien genera (in previous cube I didn't take into account genera). Occurrences at genus level are not taken into account (just 1 observation)
updating code to be compatible with the most recent rgbif version (3.0)
This PR updates the occurrence cubes for Belgium and for Europe by:
identificationVerificationStatus
, see #24)