Yes, now it's /wear clear, not /wear none. It's not an empty overlay now, so you can probably remove plugins/SkinOverlay/none.png

1. No-permission message. Just a new option in config.yml
2. Brigadier commands. Brigadier is Mojang's command framework that allows them to write commands with tab-completions, selectors like @a[name=Iaiao], subcommands, etc. And now SkinOverlays uses this framework. Also, command syntax has changed a bit:
- If you have skinoverlay.wear.others permission:
/wear <targets> <overlay name> OR /wear <targets> url <url>
- If you don't have skinoverlay.wear.others permission:
/wear <overlay name> OR /wear url <url>

Fixed 2 bugs

Now it supports 1.19. And only 1.19

Added "save" option to save skins between logouts and server restarts. It's on by default.

Now you don't become invisible after /wear

Added support for bungeecord-online-but-spigot-offline-mode and immediately change the skin for other players

Now you need skinoverlay.overlay.policeman to run /wear policeman

I took some code from SkinsRestorer and now it should work on all versions since 1.8. Also, now it says it doesn't work on offline-mode servers instead of silently throwing indescriptive errors at your console.