Update interface-ipfs-core version

Author: victorb

package.json

@@ -60,7 +60,7 @@
     "chai": "^3.5.0",
     "gulp": "^3.9.1",
     "hapi": "^15.2.0",
-    "interface-ipfs-core": "^0.18.2",
+    "interface-ipfs-core": "^0.18.3",
     "ipfsd-ctl": "^0.17.0",
     "pre-commit": "^1.1.3",
     "socket.io": "^1.5.1",