update cross-env (#2543)
update cross-env (#2543)


chenzlabs/aframe,weddingdj/aframe,darkwing/aframe,mkungla/aframe,ngokevin/aframe,jaxmolina/ar,RSpace/aframe,chenzlabs/aframe,wizgrav/aframe,dmarcos/aframe,RSpace/aframe,dmarcos/aframe,googlecreativelab/aframe,aframevr/aframe,darkwing/aframe,ngokevin/aframe,mkungla/aframe,googlecreativelab/aframe,jaxmolina/ar,wizgrav/aframe,weddingdj/aframe,aframevr/aframe