Update dependencies and support Minecraft 1.21.9

Author: vLuckyyy

README.md

@@ -16,7 +16,7 @@
 ## EternalCombat requires PacketEvents plugin to work.
 You can download it from [here](https://modrinth.com/plugin/packetevents)
 
-EternalCombat 2.0 has been tested on Minecraft versions **1.17.1 to 1.21.8**, but it should work seamlessly on most
+EternalCombat 2.0 has been tested on Minecraft versions **1.17.1 to 1.21.9**, but it should work seamlessly on most
 other versions too.
 If you run into any compatibility issues, please let us know in
 the [Issues tab](https://github.com/EternalCodeTeam/EternalCombat/issues).

eternalcombat-plugin/build.gradle.kts

@@ -88,8 +88,7 @@ bukkit {
 
 tasks {
     runServer {
-        minecraftVersion("1.21.4")
-        downloadPlugins.url("https://github.com/retrooper/packetevents/releases/download/v2.8.0/packetevents-spigot-2.8.0.jar")
+        minecraftVersion("1.21.9")
     }
 }