update dist and lib

lib/util/index.js

@@ -37,3 +37,11 @@ export function getPointDistance (pointOne, pointTwo) {
 
   return Math.sqrt(minusX * minusX + minusY * minusY)
 }
+
+export function uuid () {
+  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
+		const r = Math.random() * 16 | 0
+		const v = c == 'x' ? r : (r & 0x3 | 0x8)
+		return v.toString(16)
+	})
+}