creating a database with an Umlaut (ä) results in the wrong filename on Windows

[chocke-quattron]

Running:

const { createNativeClient, getDefaultLibraryFilename } = await import("node-firebird-driver-native");
const client = createNativeClient(getDefaultLibraryFilename());
client.createDatabase('ä');

in the nodejs REPL results in the file "ä" on Windows.