Update Kotlin to 1.6.20 (Kotlin#3235)

Author: qwwdfsad

benchmarks/src/jmh/kotlin/benchmarks/ParametrizedDispatcherBase.kt

@@ -25,7 +25,6 @@ abstract class ParametrizedDispatcherBase : CoroutineScope {
     private var closeable: Closeable? = null
 
     @Setup
-    @UseExperimental(InternalCoroutinesApi::class)
     open fun setup() {
         coroutineContext = when {
             dispatcher == "fjp" -> ForkJoinPool.commonPool().asCoroutineDispatcher()

gradle.properties

@@ -5,7 +5,7 @@
 # Kotlin
 version=1.6.1-SNAPSHOT
 group=org.jetbrains.kotlinx
-kotlin_version=1.6.0
+kotlin_version=1.6.20
 
 # Dependencies
 junit_version=4.12

kotlinx-coroutines-core/jvm/test/DispatcherKeyTest.kt

@@ -8,7 +8,7 @@ import org.junit.Test
 import kotlin.coroutines.*
 import kotlin.test.*
 
-@UseExperimental(ExperimentalStdlibApi::class)
+@OptIn(ExperimentalStdlibApi::class)
 class DispatcherKeyTest : TestBase() {
 
     companion object CustomInterceptor : AbstractCoroutineContextElement(ContinuationInterceptor),

kotlinx-coroutines-test/common/test/TestDispatchersTest.kt

@@ -23,7 +23,6 @@ class TestDispatchersTest: OrderedExecutionTestBase() {
 
     /** Tests that asynchronous execution of tests does not happen concurrently with [AfterTest]. */
     @Test
-    @NoJs
     fun testMainMocking() = runTest {
         val mainAtStart = TestMainDispatcher.currentTestDispatcher
         assertNotNull(mainAtStart)