Revert "core-js: ^3.21.1"

This reverts commit 99c7143.

Author: zhouzichun

package.json

@@ -40,7 +40,7 @@
     "@riophae/vue-treeselect": "0.4.0",
     "axios": "0.24.0",
     "clipboard": "2.0.8",
-    "core-js": "^3.21.1",
+    "core-js": "3.19.1",
     "echarts": "4.9.0",
     "element-ui": "^2.15.6",
     "file-saver": "2.0.5",