Changelog

3.1

Folia support - the plugin now runs on Folia (regionized multithreading) as well as Spigot, Paper and Purpur.
One jar for Minecraft 1.20 - 26.3 - built for Java 17, so it also runs on older 1.20.x servers.
Update checker - checks Modrinth for a new version. Admins (tpa.update.notify, ops by default) get a chat message with a download button when they join.
/tpahere <player> - ask a player to teleport to you.
/tpacancel - cancel your outgoing request.
/tpatoggle - stop receiving requests (saved across restarts).
/tpaaccept [player] and /tpadeny [player] - choose which request to answer when you have more than one. Tab completion included.
cancel-on-damage option - cancel the countdown when the player takes damage.
tpa.bypass.cooldown and tpa.bypass.delay permissions, plus tpa.admin for everything.
Hex colors in messages: &#RRGGBB.
Sounds can also be given as keys like entity.enderman.teleport (works with resource pack sounds).
Set any message to "" to turn it off.

The countdown skipped a second and showed the first number twice.
A new request no longer silently replaces an older request from another player - each player can have several incoming requests.
Rejoining the server no longer resets cooldowns.
When a player leaves, requests they sent are now removed too and the other player is told.
/tpaaccept no longer removes the request when the teleport is blocked by a cooldown or a running countdown, so it can be accepted again.
Cooldown times are rounded up, so you no longer see "wait 0 seconds".
/tpa, /tpaaccept and /tpadeny now check the tpa.use permission.
Vanished players can no longer be found with /tpa.
Sounds work on every version (the sound API changed in 1.21.3).
Teleports use the COMMAND cause, so combat and region plugins can block them.
All remaining Polish text was translated to English.

New options are added to your existing config.yml automatically - your values are kept.