Merge pull request #277 from ipfs/greenkeeper-multiaddr-2.0.0

Update multiaddr to version 2.0.0 🚀

Author: daviddias

package.json

@@ -12,7 +12,7 @@
     "flatmap": "0.0.3",
     "glob": "^7.0.3",
     "ipfs-merkle-dag": "^0.6.0",
-    "multiaddr": "^1.3.0",
+    "multiaddr": "^2.0.0",
     "multipart-stream": "^2.0.1",
     "ndjson": "^1.4.3",
     "promisify-es6": "^1.0.1",