feat: support dynamic import in babel

Author: 3cp

babel/.babelrc

@@ -3,11 +3,13 @@
     ["@babel/preset-env", {
       "loose": true,
       "targets": "edge >= 15, firefox >= 53, chrome >= 55, safari >= 11",
-      "modules": false
+      "modules": false,
+      "exclude": ["@babel/plugin-proposal-dynamic-import"]
     }]
   ],
   "plugins": [
     ["@babel/plugin-proposal-decorators", { "legacy": true }],
-    ["@babel/plugin-proposal-class-properties", { "loose": true }]
+    ["@babel/plugin-proposal-class-properties", { "loose": true }],
+    "@babel/plugin-syntax-dynamic-import"
   ]
 }

babel/package.json

@@ -2,6 +2,7 @@
   "devDependencies": {
     "@babel/plugin-proposal-decorators": "^7.0.0",
     "@babel/plugin-proposal-class-properties": "^7.0.0",
+    "@babel/plugin-syntax-dynamic-import": "^7.0.0",
     "@babel/core": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "babel-eslint": "^10.0.0",