[Wasm] stdlib NFC: Suppress cast warnings in org.w3c

Also fix dukat build and update copyright year in generated files.

libraries/tools/dukat/build.gradle.kts

@@ -15,13 +15,13 @@ dependencies {
 task("downloadIDL", JavaExec::class) {
     main = "org.jetbrains.kotlin.tools.dukat.DownloadKt"
     classpath = sourceSets["main"].runtimeClasspath
-    dependsOn(":dukat:build")
+    dependsOn("build")
 }
 
 task("generateStdlibFromIDL", JavaExec::class) {
     main = "org.jetbrains.kotlin.tools.dukat.LaunchJsKt"
     classpath = sourceSets["main"].runtimeClasspath
-    dependsOn(":dukat:build")
+    dependsOn("build")
     systemProperty("line.separator", "\n")
 }
 
@@ -30,6 +30,6 @@ task("generateStdlibFromIDL", JavaExec::class) {
 task("generateWasmStdlibFromIDL", JavaExec::class) {
     main = "org.jetbrains.kotlin.tools.dukat.LaunchWasmKt"
     classpath = sourceSets["main"].runtimeClasspath
-    dependsOn(":dukat:build")
+    dependsOn("build")
     systemProperty("line.separator", "\n")
 }

libraries/tools/dukat/src/main/kotlin/org/jetbrains/kotlin/tools/dukat/launchWasm.kt

@@ -5,10 +5,27 @@
 
 package org.jetbrains.kotlin.tools.dukat
 
+import java.io.File
+import kotlin.text.Regex
+
 fun main() {
+    val outputDirectory = "../../stdlib/wasm/src/org.w3c/"
     launch(
-        outputDirectory = "../../stdlib/wasm/src/org.w3c/",
+        outputDirectory = outputDirectory,
         dynamicAsType = true,
         useStaticGetters = true
     )
+    File(outputDirectory).walk().forEach {
+        if (it.isFile && it.name.endsWith(".kt")) {
+            it.writeText(postProcessIdlBindings(it.readText()))
+        }
+    }
+}
+
+fun postProcessIdlBindings(source: String): String {
+    return source
+        .replace(
+            Regex("( {4}return o as \\w+)"),
+            "    @Suppress(\"UNCHECKED_CAST_TO_EXTERNAL_INTERFACE\")\n\$1"
+        )
 }