Revert "Remove babylon"

This reverts commit 9f1a9c8.

Author: vhfmag

package.json

@@ -22,6 +22,7 @@
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^9.0.0",
     "babel-jest": "^23.4.2",
+    "babylon": "^6.17.2",
     "coveralls": "^2.11.8",
     "eslint": "^3.12.1",
     "eslint-config-airbnb-base": "^11.1.0",