chore(package): update rollup-plugin-babel to version 4.0.1

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
     "mini-css-extract-plugin": "^0.4.0",
     "prettier": "^1.14.0",
     "rollup": "^0.64.0",
-    "rollup-plugin-babel": "^3.0.4",
+    "rollup-plugin-babel": "^4.0.1",
     "rollup-plugin-commonjs": "^9.1.3",
     "rollup-plugin-node-resolve": "^3.3.0",
     "rollup-watch": "^4.3.1",