Merge pull request #374 from ipfs/greenkeeper-ipfs-merkle-dag-0.7.1

Update ipfs-merkle-dag to version 0.7.1 🚀

Author: dignifiedquire

package.json

@@ -25,7 +25,7 @@
     "flatmap": "0.0.3",
     "glob": "^7.0.5",
     "ipfs-block": "^0.3.0",
-    "ipfs-merkle-dag": "^0.6.0",
+    "ipfs-merkle-dag": "^0.7.1",
     "is-ipfs": "^0.2.0",
     "isstream": "^0.1.2",
     "multiaddr": "^2.0.2",