Added spread operator

Author: Philipp

babel.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+    presets: [
+        '@vue/cli-plugin-babel/preset',
+    ],
+};

dist/demo.html

@@ -0,0 +1,8 @@
+<meta charset="utf-8">
+<title>index demo</title>
+<script src="./index.umd.js"></script>
+
+
+<script>
+console.log(index)
+</script>