Update Kotlin to 1.9.21 (#380)

* Update Kotlin to 1.9.21

* Move to default kotlin language and api versions

* Drop JS LEGACY

* Update native to conform to the new kotlin

* Update native to conform to the new kotlin

* Fix file annotation on darwin

* Add `-Xexpect-actual-classes` compiler argument

* Update the order of imports to pass checks

* Set the api and language version explicitly


> 
> Apart from actually moving from Kotlin 1.8.22 to Kotlin 1.9.21, there was some work required for the code to compile:
> 
> * Add `-Xexpect-actual-classes` compiler argument
> 
> With Kotlin 1.9.20, KMP is now stable, but expect-actual mechanism for `class`es is not, hence the need to provide the compiler argument.
> 
> * Add `ExperimentalForeignApi` annotation to `cinterop` declarations
> 
> From https://kotlinlang.org/docs/whatsnew19.html#explicit-c-interoperability-stability-guarantees:
> 
> > If you want to use C-like foreign APIs such as pointers, you must opt in with `@OptIn(ExperimentalForeignApi)`, otherwise your code won't compile.
> 
> * Change `kotlin.native.concurrent.*` imports to `kotlin.concurrent.*`
> 
> AFAIK, the declarations have been somewhat stabilized and moved to the common location.
> 
> * Change `JS(BOTH)` to `JS` (same as `JS(IR)`) in the build script
> 
> From https://kotlinlang.org/docs/js-ir-compiler.html:
> 
> > The old compiler backend has been deprecated since Kotlin 1.8.0. Starting with Kotlin 1.9.0, using compiler types `LEGACY` or `BOTH` leads to an error.
> 
> * Add `kotlin.mpp.applyDefaultHierarchyTemplate=false` to gradle.properties
> 
> In Kotlin 1.9.20+ there are some improvements to reduce the amount of boilerplate in the target hierarchy: https://kotlinlang.org/docs/whatsnew1920.html#set-up-the-target-hierarchy.
> 
> But for an existing project with an established and complex target hierarchy, it's easier to simply opt-out from this feature. That's why I needed to add this option to the properties file.

Author: AzimMuradov

build.gradle.kts

@@ -1,9 +1,11 @@
 import io.gitlab.arturbosch.detekt.Detekt
-import org.gradle.jvm.tasks.Jar
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
+import org.gradle.jvm.tasks.Jar
+import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 
 plugins {
-    kotlin("multiplatform") version "1.8.22"
+    kotlin("multiplatform") version "1.9.21"
     id("org.jetbrains.dokka") version "1.8.20"
     `maven-publish`
     id("io.github.gradle-nexus.publish-plugin") version "1.3.0"
@@ -40,17 +42,25 @@ apply(plugin = "io.github.gradle-nexus.publish-plugin")
 
 kotlin {
     explicitApi()
+
+    @OptIn(ExperimentalKotlinGradlePluginApi::class)
+    compilerOptions {
+        // kotlin compiler compatibility options
+        apiVersion.set(KotlinVersion.KOTLIN_1_9)
+        languageVersion.set(KotlinVersion.KOTLIN_1_9)
+
+        freeCompilerArgs.add("-Xexpect-actual-classes")
+    }
+
     jvm {
         compilations.all {
             // kotlin compiler compatibility options
             kotlinOptions {
-                apiVersion = "1.4"
-                languageVersion = "1.4"
                 jvmTarget = "1.8"
             }
         }
     }
-    js(BOTH) {
+    js {
         browser {
             testTask {
                 useKarma {

gradle.properties

@@ -5,3 +5,4 @@ systemProp.org.gradle.internal.publish.checksums.insecure=true
 org.gradle.jvmargs=-Xmx2048m
 # see https://kotlinlang.org/docs/whatsnew18.html#sourcedirectories
 kotlin.mpp.androidSourceSetLayoutVersion=2
+kotlin.mpp.applyDefaultHierarchyTemplate=false

src/darwinMain/kotlin/io/github/oshai/kotlinlogging/DarwinKLogger.kt

@@ -1,5 +1,8 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package io.github.oshai.kotlinlogging
 
+import kotlinx.cinterop.ExperimentalForeignApi
 import kotlinx.cinterop.ptr
 import platform.darwin.OS_LOG_TYPE_DEBUG
 import platform.darwin.OS_LOG_TYPE_DEFAULT

src/darwinMain/kotlin/io/github/oshai/kotlinlogging/KotlinLoggingConfiguration.kt

@@ -1,6 +1,6 @@
 package io.github.oshai.kotlinlogging
 
-import kotlin.native.concurrent.AtomicReference
+import kotlin.concurrent.AtomicReference
 
 public object KotlinLoggingConfiguration {
   public var subsystem: AtomicReference<String?> = AtomicReference(null)

src/darwinMain/kotlin/io/github/oshai/kotlinlogging/internal/KLoggerFactory.kt

@@ -3,7 +3,7 @@ package io.github.oshai.kotlinlogging.internal
 import io.github.oshai.kotlinlogging.DarwinKLogger
 import io.github.oshai.kotlinlogging.KLogger
 import io.github.oshai.kotlinlogging.KotlinLoggingConfiguration
-import kotlin.native.concurrent.AtomicReference
+import kotlin.concurrent.AtomicReference
 import platform.darwin.OS_LOG_DEFAULT
 import platform.darwin.os_log_create
 

src/nativeMain/kotlin/io/github/oshai/kotlinlogging/ConsoleOutputAppender.kt

@@ -1,5 +1,8 @@
+@file:OptIn(ExperimentalForeignApi::class)
+
 package io.github.oshai.kotlinlogging
 
+import kotlinx.cinterop.ExperimentalForeignApi
 import platform.posix.fprintf
 import platform.posix.stderr
 

src/nativeMain/kotlin/io/github/oshai/kotlinlogging/KotlinLoggingConfiguration.kt

@@ -1,6 +1,6 @@
 package io.github.oshai.kotlinlogging
 
-import kotlin.native.concurrent.AtomicReference
+import kotlin.concurrent.AtomicReference
 
 public expect val DefaultAppender: Appender