chore(package): update babel to version 5.8.29

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -15,7 +15,7 @@
     "postcss-modules-scope": "1.0.0"
   },
   "devDependencies": {
-    "babel": "5.8.23",
+    "babel": "5.8.29",
     "babel-eslint": "4.1.3",
     "babelify": "6.4.0",
     "chokidar-cli": "1.1.0",