chore(deps): update dependency @umijs/babel-preset-umi to v3.3.6

Author: renovate-bot

package.json

@@ -22,7 +22,7 @@
     "@types/react-dom": "16.9.10",
     "@types/react": "16.14.1",
     "@types/react-helmet": "6.1.0",
-    "@umijs/babel-preset-umi": "3.2.28",
+    "@umijs/babel-preset-umi": "3.3.6",
     "@umijs/preset-react": "1.7.0",
     "@umijs/fabric": "2.3.1",
     "@umijs/utils": "3.2.28",