fix(deps): update dependency @growthbook/growthbook to ^0.20.0

Author: renovate[bot]

packages/featureflags/package.json

@@ -2,7 +2,7 @@
   "name": "@open-condo/featureflags",
   "version": "1.0.0",
   "dependencies": {
-    "@growthbook/growthbook": "^0.18.1",
+    "@growthbook/growthbook": "^0.20.0",
     "@growthbook/growthbook-react": "^0.9.1",
     "@open-condo/config": "workspace:^",
     "@open-condo/keystone": "workspace:^",