Deprecating Caddy 1

Caddy 1 reaches EOL on October 1, 2020 (https://github.com/caddyserver/caddy/blob/e385be922569c07a0471a6798d4aeaf972facb5b/.github/SECURITY.md).

Now I maintain both caddy and caddy1 aports. How should I proceed with package removal? I'm thinking about dropping it on EOL date or around the release of Alpine 3.13.0_rc1. Unfortunately, it shouldn't land in the next stable version of Alpine since it won't receive security updates anymore.