chore: add missing dep

Author: achingbrain

package.json

@@ -71,6 +71,7 @@
     "@typescript-eslint/parser": "^3.0.2",
     "aegir": "^36.0.2",
     "benchmark": "^2.1.4",
+    "datastore-core": "^7.0.1",
     "delay": "^5.0.0",
     "detect-node": "^2.1.0",
     "eslint": "^7.1.0",