chore(package): update ipfs-utils to version 0.7.2 (#592)

Co-authored-by: greenkeeper[bot] <23040076+greenkeeper[bot]@users.noreply.github.com>

Author: Alan Shaw

package.json

@@ -47,7 +47,7 @@
     "hat": "0.0.3",
     "ipfs-block": "~0.8.0",
     "ipfs-unixfs": "^0.3.0",
-    "ipfs-utils": "^0.7.1",
+    "ipfs-utils": "^0.7.2",
     "ipld-dag-cbor": "~0.15.0",
     "ipld-dag-pb": "^0.18.1",
     "is-ipfs": "~0.6.1",