deps: update sibling dependencies

Author: aegir[bot]

packages/interface-datastore-tests/package.json

@@ -135,7 +135,7 @@
   },
   "dependencies": {
     "aegir": "^38.1.0",
-    "interface-datastore": "^7.0.0",
+    "interface-datastore": "^8.0.0",
     "iso-random-stream": "^2.0.0",
     "it-all": "^2.0.0",
     "it-drain": "^2.0.0",