update popper.min.js cdn
@@ -181,7 +181,7 @@ class Template_mixin(object):
<meta name="generator" content="%(generator)s"/>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
- <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
+ <script src="https://cdn.bootcss.com/popper.js/1.15.0/umd/popper.min.js"></script>
<script src="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
<script src="http://apps.bdimg.com/libs/Chart.js/0.2.0/Chart.min.js"></script>
<!-- <link href="https://cdn.bootcss.com/echarts/3.8.5/echarts.common.min.js" rel="stylesheet"> -->
