update: 升级element

package.json

@@ -16,7 +16,7 @@
     "@chenfengyuan/vue-qrcode": "^1.0.1",
     "clipboard": "^2.0.4",
     "echarts": "^4.4.0",
-    "element-ui": "^2.12.0",
+    "element-ui": "^2.15.6",
     "file-saver": "^1.3.8",
     "moment": "^2.29.1",
     "sass": "^1.26.11",