fix(package): update ipfs-unixfs to version 0.3.0

Closes #2610

Author: greenkeeper[bot]

package.json

@@ -103,7 +103,7 @@
     "ipfs-mfs": "^0.13.2",
     "ipfs-multipart": "^0.2.0",
     "ipfs-repo": "^0.30.0",
-    "ipfs-unixfs": "~0.1.16",
+    "ipfs-unixfs": "~0.3.0",
     "ipfs-unixfs-exporter": "^0.38.0",
     "ipfs-unixfs-importer": "^0.42.0",
     "ipfs-utils": "~0.4.0",