Delay renovate by 7 days (#15)

Prevent renovate from picking up updates until they're 7 days old

Reviewed-on: #15

renovate.json

@@ -1,7 +1,7 @@
-
 {
     "extends": [":automergeMinor", ":automergePr", ":automergeRequireAllStatusChecks", ":dependencyDashboard", ":disableRateLimiting", ":rebaseStalePrs"],
     "major": {
       "dependencyDashboardApproval": true
-    }
+    },
+    "minimumReleaseAge": "7 days"
 }