Change SwiftKitCore to Java 11 instead of 17 (#407)

Author: madsodgaard

SwiftKitCore/build.gradle

@@ -43,11 +43,13 @@ publishing {
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(17))
+        languageVersion.set(JavaLanguageVersion.of(24))
     }
-    // Support Android 6+ (Java 7)
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+}
+
+tasks.withType(JavaCompile).configureEach {
+    // Support Java 11
+    options.release.set(11)
 }
 
 dependencies {