babel-core is also a peer-dep

Author: yyx990803

package.json

@@ -36,6 +36,7 @@
     "css-loader": "^0.21.0",
     "style-loader": "^0.13.0",
     "babel-loader": "^6.1.0",
+    "babel-core": "^6.1.2",
     "babel-plugin-transform-runtime": "^6.1.2",
     "babel-preset-es2015": "^6.1.2",
     "babel-runtime": "^6.0.14",