Fix Java 21 build.

Author: jenetics

build.gradle.kts

@@ -51,7 +51,7 @@ allprojects {
 	}
 
 	configurations.all {
-		resolutionStrategy.failOnVersionConflict()
+		resolutionStrategy.preferProjectModules()
 	}
 }
 

buildSrc/build.gradle.kts

@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 /*
  * Java GPX Library (@__identifier__@).
  * Copyright (c) @__year__@ Franz Wilhelmstötter
@@ -33,6 +35,10 @@ repositories {
 	gradlePluginPortal()
 }
 
+tasks.withType<KotlinCompile>().configureEach {
+	kotlinOptions.jvmTarget = "17"
+}
+
 configure<JavaPluginExtension> {
 	sourceCompatibility = JavaVersion.VERSION_17
 	targetCompatibility = JavaVersion.VERSION_17

settings.gradle.kts

@@ -35,7 +35,7 @@ dependencyResolutionManagement {
 		create("libs") {
 			library("assertj", "org.assertj:assertj-core:3.24.2")
 			library("commons-math", "org.apache.commons:commons-math3:3.6.1")
-			library("equalsverifier", "nl.jqno.equalsverifier:equalsverifier:3.7.2")
+			library("equalsverifier", "nl.jqno.equalsverifier:equalsverifier:3.15.3")
 			library("guava", "com.google.guava:guava:32.1.3-jre")
 			library("prngine", "io.jenetics:prngine:2.0.0")
 			library("rxjava", "io.reactivex.rxjava2:rxjava:2.2.21")