fix: babel

.babelrc

@@ -0,0 +1,17 @@
+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "targets": {
+          "edge": "17",
+          "firefox": "60",
+          "chrome": "67",
+          "safari": "11.1"
+        },
+        "corejs": 2,
+        "useBuiltIns": "usage" // @babel/polyfill 配置：usage 按需加载 ECMAscript 规范库
+      }
+    ]
+  ]
+}