Fix peerDependency for 'babel-loader'

Author: MichaelDeBoey

package.json

@@ -58,6 +58,7 @@
     "react": "^0.14.9 || ^15.3.0",
     "react-addons-test-utils": "^0.14.8 || ^15.3.0",
     "react-dom": "^0.14.9 || ^15.3.0",
-    "sinon": "^2.1.0"
+    "sinon": "^2.1.0",
+    "webpack": "^2.5.1"
   }
 }