Target Java 17 for Kotlin too.

Author: mpawliszyn

client-sqldelight-gradle-plugin/build.gradle.kts

@@ -1,6 +1,7 @@
 import com.vanniktech.maven.publish.GradlePlugin
 import com.vanniktech.maven.publish.JavadocJar
 import com.vanniktech.maven.publish.MavenPublishBaseExtension
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
 
 plugins {
   id("java-gradle-plugin")
@@ -48,6 +49,12 @@ tasks.withType<JavaCompile> {
   targetCompatibility = JavaVersion.VERSION_17.toString()
 }
 
+tasks.withType(KotlinJvmCompile::class.java).configureEach {
+  kotlinOptions {
+    jvmTarget = "17"
+  }
+}
+
 gradlePlugin {
   plugins {
     create("backfila-client-sqldelight") {