Update build.gradle.kts

Author: CoasterFreakDE

build.gradle.kts

@@ -4,6 +4,7 @@ import java.util.*
 
 plugins {
     kotlin("jvm") version "2.0.21"
+    `java-library`
     id("io.papermc.paperweight.userdev") version "2.0.0-SNAPSHOT"
     kotlin("plugin.serialization") version "2.1.0"
     id("maven-publish")