fix gradle

Author: Lars Grahmann

build.gradle

@@ -1,9 +1,9 @@
 apply plugin: 'java'
 
 group 'de.worldiety'
-version '1.2'
+version '1.3'
 
-sourceCompatibility = 17
+sourceCompatibility = JavaVersion.VERSION_17
 
 repositories {
     mavenCentral()
@@ -17,10 +17,15 @@ sourceSets {
     }
 }
 
+tasks.withType(Copy).all {
+    duplicatesStrategy 'exclude'
+}
+
 jar {
     exclude 'META-INF/*.RSA', 'META-INF/*.SF', 'META-INF/*.DSA'
+    duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
     from {
-        (configurations.runtime).collect {
+        (configurations.runtimeClasspath).collect {
             it.isDirectory() ? it : zipTree(it)
         }
     }