Rollup support for dynamic import

package.json

@@ -96,6 +96,7 @@
     "@babel/core": "^7.2.2",
     "@babel/plugin-external-helpers": "^7.2.0",
     "@babel/plugin-proposal-class-properties": "^7.2.3",
+    "@babel/plugin-syntax-dynamic-import": "^7.2.0",
     "@babel/plugin-transform-runtime": "^7.2.0",
     "@babel/preset-env": "^7.2.3",
     "@babel/preset-react": "^7.0.0",