chore(package): update babel-core to version 6.4.5

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -23,7 +23,7 @@
     "url": "https://github.com/ipfs/js-ipfs-api"
   },
   "devDependencies": {
-    "babel-core": "^6.1.21",
+    "babel-core": "^6.4.5",
     "babel-eslint": "^4.1.6",
     "babel-loader": "^6.2.0",
     "babel-plugin-transform-runtime": "^6.1.18",