added support for Java 8

build.gradle

@@ -13,12 +13,21 @@ allprojects {
     repositories {
         maven {
             url = woggioniMavenRepositoryUrl
+            content {
+                includeModule 'net.woggioni', 'xclassloader'
+            }
         }
         mavenCentral()
     }
 
     group = "net.woggioni.gradle"
 
+    java {
+        toolchain {
+            languageVersion = JavaLanguageVersion.of(17)
+        }
+    }
+
     lombok {
         version = getProperty('version.lombok')
     }
@@ -33,6 +42,10 @@ allprojects {
         add("testImplementation", gradleTestKit())
     }
 
+    tasks.named(JavaPlugin.COMPILE_JAVA_TASK_NAME, JavaCompile) {
+        options.release = 8
+    }
+
     tasks.named("test", Test) {
         useJUnitPlatform()
     }
@@ -58,11 +71,6 @@ dependencies {
     embedded project(path: "common", configuration: "archives")
 }
 
-java {
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
-}
-
 tasks.named('processResources', ProcessResources) {
     from {
         configurations.named('embedded').map {