I'm aware that the 1.16 update will be release on June 23rd!

Rest assured, I'm already preparing as much as I can. However, in order to finalize the update the Spigot team needs to release Bukkit and BuildTools updates first. As soon as they do so, I can work on adding full 1.16 support. I'd exepect them to release their updates on June 23rd, too. This means, that an update of SilkSpawners will likely follow on June 24/25th.

Predicated release is postponed to 25/26th because Spigot has not yet released an update.