first changes

build.gradle

@@ -1,6 +1,7 @@
 plugins {
 	id 'fabric-loom' version '1.10-SNAPSHOT'
 	id 'maven-publish'
+    id 'org.jetbrains.kotlin.jvm'
 }
 
 archivesBaseName = project.archives_base_name
@@ -26,7 +27,8 @@ repositories {
 		name = 'minelp-release'
 		url = 'https://repo.minelittlepony-mod.com/maven/release'
 	}
-	// Add repositories to retrieve artifacts from in here.
+    mavenCentral()
+    // Add repositories to retrieve artifacts from in here.
 	// You should only use this when depending on other mods because
 	// Loom adds the essential maven repositories to download Minecraft and libraries from automatically.
 	// See https://docs.gradle.org/current/userguide/declaring_repositories.html
@@ -46,6 +48,7 @@ dependencies {
 	include "com.minelittlepony:kirin:${project.kirin_version}"
 
 	modCompileOnly("com.terraformersmc:modmenu:${project.modmenu_version}")
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
 }
 
 processResources {
@@ -66,8 +69,6 @@ java {
 	// if it is present.
 	// If you remove this line, sources will not be generated.
 	withSourcesJar()
-	sourceCompatibility = JavaVersion.VERSION_21
-	targetCompatibility = JavaVersion.VERSION_21
 }
 
 jar {
@@ -92,3 +93,6 @@ publishing {
 		// retrieving dependencies.
 	}
 }
+kotlin {
+    jvmToolchain(21)
+}