chore(package): update aegir to version 9.1.2 (#86)

Author: greenkeeperio-bot

package.json

@@ -39,7 +39,7 @@
   },
   "homepage": "https://github.com/ipfs/js-ipfs-unixfs-engine#readme",
   "devDependencies": {
-    "aegir": "^9.1.0",
+    "aegir": "^9.1.2",
     "buffer-loader": "0.0.1",
     "chai": "^3.5.0",
     "fs-pull-blob-store": "^0.4.1",