fix: add missing dependencies

Closes #407

Author: dignifiedquire

package.json

@@ -23,6 +23,7 @@
   },
   "dependencies": {
     "async": "^2.1.2",
+    "cids": "^0.2.0",
     "bl": "^1.1.2",
     "bs58": "^3.0.0",
     "detect-node": "^2.0.3",
@@ -34,6 +35,7 @@
     "is-ipfs": "^0.2.1",
     "isstream": "^0.1.2",
     "multiaddr": "^2.0.3",
+    "multihashes": "^0.2.2",
     "multipart-stream": "^2.0.1",
     "ndjson": "^1.4.3",
     "peer-id": "^0.8.0",