bump gl-plot3d to 1.5.2 (iOS fixes)

Author: etpinard

package.json

@@ -67,7 +67,7 @@
     "gl-mat4": "^1.1.2",
     "gl-mesh3d": "^1.2.0",
     "gl-plot2d": "^1.2.0",
-    "gl-plot3d": "^1.5.1",
+    "gl-plot3d": "^1.5.2",
     "gl-pointcloud2d": "^1.0.0",
     "gl-scatter2d": "^1.2.2",
     "gl-scatter2d-fancy": "^1.2.1",