install is-mobile in stackgl too

Author: archmoj

stackgl_modules/package-lock.json

@@ -30,6 +30,7 @@
     "gl-surface3d": "^1.6.0",
     "glslify": "^7.1.1",
     "incremental-convex-hull": "plotly/incremental-convex-hull#v1.1.0",
+    "is-mobile": "^3.1.1",
     "matrix-camera-controller": "^2.1.4",
     "ndarray": "plotly/ndarray#v1.1.0",
     "ndarray-extract-contour": "plotly/ndarray-extract-contour#v1.1.0",