Fix JVM target compatibility issue

Author: hannesa2

chartLib/build.gradle.kts

@@ -1,4 +1,5 @@
 import info.git.versionHelper.getVersionText
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import java.net.URI
 
 plugins {
@@ -24,6 +25,11 @@ android {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
     }
+    kotlin {
+        compilerOptions {
+            jvmTarget = JvmTarget.JVM_17
+        }
+    }
     buildTypes {
         release {
             isMinifyEnabled = false