remove redundant `style-attr` from devDependencies
remove redundant `style-attr` from devDependencies

wizgrav/aframe,wizgrav/aframe,aframevr/aframe-core,weddingdj/aframe,jzitelli/aframe,mkungla/aframe,msimpson/aframe,MatthewShotton/aframe,fernandojsg/aframe,ngokevin/aframe,fernandojsg/aframe,RSpace/aframe,jaxmolina/ar,MatthewShotton/aframe,ngokevin/aframe,darkwing/aframe,aframevr/aframe,aframevr/aframe,googlecreativelab/aframe,chenzlabs/aframe,darkwing/aframe,dmarcos/aframe,jzitelli/aframe,aframevr/aframe-core,dmarcos/aframe,chenzlabs/aframe,RSpace/aframe,jaxmolina/ar,weddingdj/aframe,mkungla/aframe,msimpson/aframe,googlecreativelab/aframe