Bump Kotlin version to match Gradle version

build.gradle

@@ -42,9 +42,8 @@ kotlin {
   jvmToolchain(11)
   target {
     compilations.configureEach {
-      // Ensure compatibility with old Gradle versions running Kotlin 1.4.
-      // When changing this value see kotlinCompatibility.kt and delete unnecessary backports.
-      compilerOptions.options.apiVersion.set(KotlinVersion.KOTLIN_1_4)
+      // Ensure compatibility with old Gradle versions. Keep in sync with LicenseePlugin.kt.
+      compilerOptions.options.apiVersion.set(KotlinVersion.KOTLIN_1_8)
     }
   }
 }

src/main/kotlin/app/cash/licensee/plugin.kt

@@ -38,6 +38,8 @@ private const val reportFolder = "licensee"
 @Suppress("unused") // Instantiated reflectively by Gradle.
 class LicenseePlugin : Plugin<Project> {
   override fun apply(project: Project) {
+    // HEY! If you update the minimum-supported Gradle version check to see if the Kotlin language version
+    // can be bumped. See https://docs.gradle.org/current/userguide/compatibility.html#kotlin.
     require(GradleVersion.current() >= GradleVersion.version("8.0")) {
       "Licensee plugin requires Gradle 8.0 or later. Found ${GradleVersion.current()}"
     }
@@ -143,7 +145,7 @@ private fun configureAndroidVariants(
 ) {
   val androidComponents = project.extensions.getByType(AndroidComponentsExtension::class.java)
   androidComponents.onVariants { variant ->
-    val suffix = variant.name.capitalize(ROOT)
+    val suffix = variant.name.replaceFirstChar { it.titlecase(ROOT) }
     val taskName = "${baseTaskName}Android$suffix"
 
     val task = project.tasks.configure(taskName) {
@@ -176,7 +178,7 @@ private fun configureKotlinMultiplatformTargets(
       return@configureEach // handled by android logic.
     }
 
-    val suffix = target.name.capitalize(ROOT)
+    val suffix = target.name.replaceFirstChar { it.titlecase(ROOT) }
     val task = project.tasks.configure("$baseTaskName$suffix") {
       it.group = VERIFICATION_GROUP
       it.description = taskDescription("Kotlin ${target.name} target")