Update to Kotlin 2.2.20

Author: bashor

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
-kotlin = "2.2.10"
-kotlinx-browser = "0.3"
+kotlin = "2.2.20-RC2"
+kotlinx-browser = "0.5.0"
 
 [libraries]
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }

src/wasmJsMain/kotlin/timeZoneWidget.kt

@@ -1,3 +1,5 @@
+@file:OptIn(ExperimentalWasmJsInterop::class)
+
 import kotlinx.browser.document
 import kotlinx.browser.window
 import kotlinx.dom.appendElement