message: [tests] Delay deprecation message
  This PR is a follow up to which was unable to deprecate a package immediately after publishing and failed with E405. So this PR adds a delay between publish and deprecate. It also uses the `-f` flag suggested in the error message.
diff: @@ -33,6 +33,7 @@ for tag in $tags; do
  echo "Running \`npm publish $npm_tag\` in \"$(pwd)\""
  npm publish $npm_tag
  - echo "Running \`npm deprecate $now_name@$version\` in favor of $vc_name"
  - npm deprecate "$now_name@$version" "\"$now_name\" is deprecated and will stop receiving updates on December 31, 2020. Please use \"$vc_name\" instead."
  + sleep 5 # Wait after publish before deprecate to avoid E405. https://github.com/vercel/vercel/runs/1076007594#step:6:649
  + echo "Running \`npm deprecate -f $now_name@$version\` in favor of $vc_name"
  + npm deprecate -f "$now_name@$version" "\"$now_name\" is deprecated and will stop receiving updates on December 31, 2020. Please use \"$vc_name\" instead."
  done
  