chore: upgrade dependencies

Author: vasco-santos

package.json

@@ -38,8 +38,8 @@
     "npm": ">=3.0.0"
   },
   "devDependencies": {
-    "aegir": "^15.2.0",
-    "chai": "^4.1.2",
+    "aegir": "^15.3.0",
+    "chai": "^4.2.0",
     "dirty-chai": "^2.0.1",
     "lodash": "^4.17.5",
     "memdown": "^1.4.1",
@@ -57,7 +57,7 @@
     "datastore-fs": "~0.6.0",
     "datastore-level": "~0.9.0",
     "debug": "^3.1.0",
-    "interface-datastore": "~0.5.0",
+    "interface-datastore": "~0.6.0",
     "ipfs-block": "~0.7.1",
     "lock-me": "^1.0.4",
     "lodash.get": "^4.4.2",