Change some versions, fix warnings

composeApp/build.gradle.kts

@@ -1,20 +1,22 @@
 import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
 
 plugins {
     alias(libs.plugins.kotlinMultiplatform)
     alias(libs.plugins.androidApplication)
     alias(libs.plugins.jetbrainsCompose)
+    alias(libs.plugins.jetbrainsKotlinCompose)
+}
+
+tasks.withType<KotlinJvmCompile>().configureEach {
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_11)
+    }
 }
 
 kotlin {
-    androidTarget {
-        compilations.all {
-            kotlinOptions {
-                jvmTarget = "11"
-            }
-        }
-    }
-
+    androidTarget()
     jvm("desktop")
 
     sourceSets {