chore(deps): update ipfs-block

Author: dignifiedquire

package.json

@@ -41,7 +41,7 @@
     "chai": "^3.5.0",
     "cids": "^0.4.2",
     "dirty-chai": "^1.2.2",
-    "ipfs-block": "~0.5.5",
+    "ipfs-block": "~0.6.0",
     "ipfs-repo": "~0.11.3",
     "lodash": "^4.17.4",
     "multihashing-async": "^0.4.4",
@@ -50,7 +50,8 @@
     "rimraf": "^2.6.1"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=4.0.0",
+    "npm": ">=3.0.0"
   },
   "dependencies": {},
   "contributors": [