load refs in parallel
load refs in parallel

yohanboniface/imposm3,gaspardle/imposm3,ImreSamu/imposm3,bdon/imposm3,olehz/imposm3,bdon/imposm3,gaspardle/imposm3,omniscale/imposm3,osm2vectortiles/imposm3,yohanboniface/imposm3,omniscale/imposm3,olehz/imposm3