Merge pull request #170 from ipfs/greenkeeper/cids-0.5.0

Update cids to the latest version 🚀

Author: daviddias

package.json

@@ -53,7 +53,7 @@
   },
   "dependencies": {
     "async": "^2.1.5",
-    "cids": "^0.4.2",
+    "cids": "^0.5.0",
     "deep-extend": "^0.4.1",
     "ipfs-unixfs": "^0.1.11",
     "ipld-dag-pb": "^0.11.0",