fix react example

Author: uNmAnNeR

packages/react-imask/example.html

@@ -9,8 +9,8 @@ <h1>React IMask Plugin Demo</h1>
   <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
   <script src="https://unpkg.com/[email protected]/babel.min.js"></script>
   <script src="https://unpkg.com/prop-types@15/prop-types.js"></script>
-  <!-- <script src="https://unpkg.com/imask"></script> -->
-  <script src="dist/imask.js"></script>
+  <script src="https://unpkg.com/imask"></script>
+  <!-- <script src="dist/imask.js"></script> -->
   <script src="dist/react-imask.js"></script>
   <script type="text/babel">
     const mask = Number;