message: backward compatibility for init
diff: @@ -27,6 +27,10 @@ export async function importMap(url: URL, plugins: string[] = []) {
  const { config, importMap, file } = denoConfig;
  // Configure the import map
  + if (Deno.version.deno < "1.30.0") {
  + config.importMap ||= "./import_map.json";
  + }
  +
  const oldUrl = importMap.imports["lume/"];
  const newUrl = new URL("./", url).href;
  importMap.imports["lume/"] = newUrl;
  