Update Java, Gradle, Quarkus & Spotless

.github/workflows/build.yaml

@@ -10,7 +10,7 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: '17'
+          java-version: '21'
       - name: Get tag or branch
         id: get_tag_or_branch
         run: |

build.gradle.kts

@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 plugins {
     val kotlinVersion = "2.0.0"
 
@@ -47,8 +49,6 @@ group = "com.faforever.icebreaker"
 version = "1.0.0-SNAPSHOT"
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
 }
 
 tasks.withType<Test> {
@@ -61,12 +61,9 @@ allOpen {
 }
 
 tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17.toString()
-        javaParameters = true
-
-        // For creation of default methods in interfaces
-        freeCompilerArgs = listOf("-Xjvm-default=all")
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_21)
+        javaParameters.set(true)
     }
 }
 
@@ -96,7 +93,7 @@ noArg {
 }
 
 spotless {
-    val ktlintVersion = "0.49.1"
+    val ktlintVersion = "1.3.0"
     kotlin {
         ktlint(ktlintVersion)
     }

gradle.properties

@@ -1,7 +1,5 @@
-#Gradle properties
-#Sun Nov 19 14:11:53 CET 2023
-quarkusPlatformArtifactId=quarkus-bom
-quarkusPlatformGroupId=io.quarkus.platform
-quarkusPlatformVersion=3.5.0
 quarkusPluginId=io.quarkus
-quarkusPluginVersion=3.5.0
+quarkusPluginVersion=3.12.0
+quarkusPlatformGroupId=io.quarkus.platform
+quarkusPlatformArtifactId=quarkus-bom
+quarkusPlatformVersion=3.12.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists