Bump Kotlin version to 2.0.20

Author: Abduqodiri Qurbonzoda

benchmarks/build.gradle.kts

@@ -1,6 +1,6 @@
 import kotlinx.benchmark.gradle.JvmBenchmarkTarget
 import org.gradle.jvm.tasks.Jar
-import org.jetbrains.kotlin.gradle.targets.js.dsl.ExperimentalWasmDsl
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 
 plugins {
     id("kotlin-multiplatform")

build.gradle.kts

@@ -2,7 +2,7 @@ import org.jetbrains.kotlin.gradle.dsl.KotlinJsCompile
 
 buildscript {
     dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.21")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.20")
     }
 }
 

core/api/kotlinx-collections-immutable.klib.api

@@ -120,6 +120,9 @@ final class <#A: kotlin/Any?, #B: out kotlin/Any?> kotlinx.collections.immutable
     final fun hashCode(): kotlin/Int // kotlinx.collections.immutable.adapters/ImmutableMapAdapter.hashCode|hashCode(){}[0]
     final fun isEmpty(): kotlin/Boolean // kotlinx.collections.immutable.adapters/ImmutableMapAdapter.isEmpty|isEmpty(){}[0]
     final fun toString(): kotlin/String // kotlinx.collections.immutable.adapters/ImmutableMapAdapter.toString|toString(){}[0]
+
+    // Targets: [js]
+    final fun asJsReadonlyMapView(): kotlin.js.collections/JsReadonlyMap<#A, #B> // kotlinx.collections.immutable.adapters/ImmutableMapAdapter.asJsReadonlyMapView|asJsReadonlyMapView(){}[0]
 }
 
 final class <#A: kotlin/Any?> kotlinx.collections.immutable.adapters/ImmutableListAdapter : kotlin.collections/List<#A>, kotlinx.collections.immutable/ImmutableList<#A> { // kotlinx.collections.immutable.adapters/ImmutableListAdapter|null[0]
@@ -141,6 +144,9 @@ final class <#A: kotlin/Any?> kotlinx.collections.immutable.adapters/ImmutableLi
     final fun listIterator(kotlin/Int): kotlin.collections/ListIterator<#A> // kotlinx.collections.immutable.adapters/ImmutableListAdapter.listIterator|listIterator(kotlin.Int){}[0]
     final fun subList(kotlin/Int, kotlin/Int): kotlinx.collections.immutable/ImmutableList<#A> // kotlinx.collections.immutable.adapters/ImmutableListAdapter.subList|subList(kotlin.Int;kotlin.Int){}[0]
     final fun toString(): kotlin/String // kotlinx.collections.immutable.adapters/ImmutableListAdapter.toString|toString(){}[0]
+
+    // Targets: [js]
+    final fun asJsReadonlyArrayView(): kotlin.js.collections/JsReadonlyArray<#A> // kotlinx.collections.immutable.adapters/ImmutableListAdapter.asJsReadonlyArrayView|asJsReadonlyArrayView(){}[0]
 }
 
 final class <#A: kotlin/Any?> kotlinx.collections.immutable.adapters/ImmutableSetAdapter : kotlinx.collections.immutable.adapters/ImmutableCollectionAdapter<#A>, kotlinx.collections.immutable/ImmutableSet<#A> { // kotlinx.collections.immutable.adapters/ImmutableSetAdapter|null[0]

core/build.gradle.kts

@@ -1,5 +1,5 @@
 import kotlinx.team.infra.mavenPublicationsPom
-import org.jetbrains.kotlin.gradle.targets.js.dsl.ExperimentalWasmDsl
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 
 plugins {
     id("kotlin-multiplatform")

core/commonTest/src/stress/ExecutionTimeMeasuringTest.kt

@@ -10,7 +10,6 @@ import kotlin.test.BeforeTest
 import kotlin.time.*
 import kotlin.time.Duration.Companion.seconds
 
-@OptIn(ExperimentalTime::class)
 abstract class ExecutionTimeMeasuringTest {
     private var clockMark: TimeMark? = null
 

core/commonTest/src/stress/list/PersistentListBuilderTest.kt

@@ -17,9 +17,7 @@ import tests.testOn
 import kotlin.random.Random
 import kotlin.random.nextInt
 import kotlin.test.*
-import kotlin.time.ExperimentalTime
 
-@OptIn(ExperimentalTime::class)
 class PersistentListBuilderTest : ExecutionTimeMeasuringTest() {
 
     @Test