Use direct npm deps

Author: dy

package-lock.json

@@ -95,12 +95,12 @@
     "ndarray-fill": "^1.0.2",
     "ndarray-homography": "^1.0.0",
     "ndarray-ops": "^1.2.2",
-    "point-cluster": "github:dfcreative/point-cluster",
+    "point-cluster": "^3.1.2",
     "polybooljs": "^1.2.0",
     "regl": "^1.3.1",
     "regl-error2d": "^2.0.3",
     "regl-line2d": "^2.1.5",
-    "regl-scatter2d": "github:dfcreative/regl-scatter2d",
+    "regl-scatter2d": "^3.0.0",
     "right-now": "^1.0.0",
     "robust-orientation": "^1.1.3",
     "sane-topojson": "^2.0.0",