chore: update deps

Author: daviddias

package.json

@@ -36,8 +36,8 @@
   },
   "homepage": "https://github.com/ipfs/js-ipfs-unixfs#readme",
   "devDependencies": {
-    "aegir": "^10.0.0",
-    "chai": "^3.5.0",
+    "aegir": "^11.0.2",
+    "chai": "^4.0.2",
     "pre-commit": "^1.2.2"
   },
   "dependencies": {