correct babel dev dependency

packages/next/package.json

@@ -74,7 +74,6 @@
     "@babel/preset-typescript": "7.7.2",
     "@babel/runtime": "7.7.2",
     "@babel/types": "7.7.4",
-    "babel-plugin-dynamic-import-node": "2.3.0",
     "babel-plugin-syntax-jsx": "6.18.0",
     "babel-plugin-transform-define": "2.0.0",
     "babel-plugin-transform-react-remove-prop-types": "0.4.24",
@@ -150,6 +149,7 @@
     "async-sema": "3.0.0",
     "autodll-webpack-plugin": "0.4.2",
     "babel-loader": "8.0.6",
+    "babel-plugin-dynamic-import-node": "2.3.0",
     "cache-loader": "4.1.0",
     "chalk": "2.4.2",
     "ci-info": "2.0.0",