Set explicit lang version 1.3 for kotlin-native-utils & kotlin-util-io

Without explicit version we cannot use those modules in buildscripts with Gradle 6.8+ because Gradle doesn't set flag `skipPrereleaseCheck` (previously was named `skipMetadataVersionCheck`). This way we make it compatible with all supported versions of Gradle.

compiler/util-io/build.gradle.kts

@@ -15,6 +15,13 @@ sourceSets {
     "test" { projectDefault() }
 }
 
+tasks {
+    withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+        kotlinOptions.languageVersion = "1.3"
+        kotlinOptions.apiVersion = "1.3"
+    }
+}
+
 publish()
 
 standardPublicJars()

native/utils/build.gradle.kts

@@ -19,6 +19,13 @@ sourceSets {
     "test" { projectDefault() }
 }
 
+tasks {
+    withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+        kotlinOptions.languageVersion = "1.3"
+        kotlinOptions.apiVersion = "1.3"
+    }
+}
+
 // TODO: this single known external consumer of this artifact is Kotlin/Native backend,
 //  so publishing could be stopped after migration to monorepo
 publish()

native/utils/src/org/jetbrains/kotlin/konan/target/utils.kt

@@ -5,8 +5,6 @@
 
 package org.jetbrains.kotlin.konan.target
 
-import java.util.*
-
 /**
  * Name of a preset used in the 'kotlin-multiplatform' Gradle plugin to represent this target.
  */
@@ -21,5 +19,5 @@ val KonanTarget.presetName: String
 
 private fun evaluatePresetName(targetName: String): String {
     val nameParts = targetName.split('_').mapNotNull { it.takeIf(String::isNotEmpty) }
-    return nameParts.asSequence().drop(1).joinToString("", nameParts.firstOrNull().orEmpty()) { it.capitalize(Locale.US) }
+    return nameParts.asSequence().drop(1).joinToString("", nameParts.firstOrNull().orEmpty()) { it.capitalize() }
 }