Update Gradle and JVM versions in klang project

This commit updates the Gradle version to 8.5 from 8.4-rc-2 and adjusts JVM toolchain from version 17 to 21. Additionally, the versions of plugins kotlin("jvm") and kotlin("plugin.serialization") are updated, improving the compatibility and performance of the project.

klang/build.gradle.kts

@@ -1,7 +1,8 @@
 plugins {
-    kotlin("jvm") version "1.9.10"
-    kotlin("plugin.serialization") version "1.9.10"
-    id("org.jetbrains.kotlinx.kover") version "0.7.3"
+	kotlin("jvm") version "1.9.20"
+	kotlin("plugin.serialization") version "1.9.20"
+	id("org.jetbrains.kotlinx.kover") version "0.7.3"
+	id("com.gradle.plugin-publish") version "1.0.0"
 }
 
 val projectVersion = System.getenv("VERSION")
@@ -22,16 +23,18 @@ allprojects {
 	version = projectVersion
 
 	kotlin {
-		jvmToolchain(17)
+		jvmToolchain(21)
 
-    sourceSets.all {
-        languageSettings {
-            java {
-                sourceCompatibility = JavaVersion.VERSION_21
-                targetCompatibility = JavaVersion.VERSION_21
-            }
-            languageVersion = "2.0"
-        }
+		sourceSets.all {
+			languageSettings {
+				java {
+					sourceCompatibility = JavaVersion.VERSION_21
+					targetCompatibility = JavaVersion.VERSION_21
+				}
+				languageVersion = "2.0"
+			}
+		}
+	}
 
 	publishing {
 
@@ -57,4 +60,3 @@ allprojects {
 	}
 }
 
-

klang/gradle-plugin/build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
-	id("com.gradle.plugin-publish") version "1.0.0"
-	kotlin("jvm") version "1.9.0"
+	kotlin("jvm")
+	id("com.gradle.plugin-publish")
 }
 
 gradlePlugin {

klang/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-rc-2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME