Merge pull request #56 from ipfs/greenkeeper-ipfs-merkle-dag-0.6.1

Update ipfs-merkle-dag to version 0.6.1 🚀

Author: daviddias

package.json

@@ -57,7 +57,7 @@
     "bs58": "^3.0.0",
     "debug": "^2.2.0",
     "field-trip": "0.0.3",
-    "ipfs-merkle-dag": "^0.5.0",
+    "ipfs-merkle-dag": "^0.6.1",
     "ipfs-unixfs": "^0.1.0",
     "is-ipfs": "^0.2.0",
     "isstream": "^0.1.2",