support for serialized frames

src/commonMain/kotlin/net.sergeych.bintools/DataSink.kt

@@ -35,6 +35,9 @@ inline fun <reified T:Any>DataSink.writeNumber(value: T) {
 fun DataSink.writeI32(value: Int) {
     writeBytes(intToBytes(value))
 }
+fun DataSink.writeU32(value: UInt) {
+    writeBytes(uintToBytes(value))
+}
 
 fun DataSink.writeI64(value: Long) {
     writeBytes(longToBytes(value))