Use N3 fork for now because of object is IRI bug

Author: jmatsushita

package.json

@@ -36,7 +36,7 @@
     "async": "^2.1.4",
     "jsonld": "~0.4.6",
     "memdb": "^1.3.1",
-    "n3": "^0.9.0",
+    "n3": "iilab/N3.js#fix/object-is-not-IRI",
     "uuid": "^3.0.1"
   },
   "peerDependencies": {