chore: restore reproducibility of kotlin sources jar (#370)

Author: iProdigy

kotlin/build.gradle.kts

@@ -1,3 +1,6 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
+
 plugins {
     kotlin("jvm") version "2.1.0"
     id("org.jetbrains.dokka") version "1.9.20"
@@ -13,8 +16,15 @@ dependencies {
     testImplementation(project(":cache-provider-caffeine"))
 }
 
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
-    kotlinOptions.jvmTarget = JavaVersion.VERSION_1_8.toString()
+tasks.withType<KotlinJvmCompile>().configureEach {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_1_8
+    }
+}
+
+tasks.kotlinSourcesJar {
+    // Workaround for https://youtrack.jetbrains.com/issue/KT-54207/ in order to restore reproducibility
+    enabled = false
 }
 
 tasks.javadocJar {