add echarts in utils

src/plugins/vue-inject.js

 import Vue from 'vue';
 import rocNative from '@/utils/jsbridge';
+import echart from '@/utils/echarts';
 import { Toast } from 'vant';
-const echarts = window.echarts;
-
+const echarts = (window.echarts = echart);
+console.log('-----$echarts', echarts);
 Vue.use(Toast);
 Vue.prototype.$echarts = echarts;
 Vue.prototype.$rocNative = new rocNative();