message: allow to create import map files in subdirectories
diff: import { brightGreen } from "../deps/colors.ts";
  +import { dirname } from "../deps/path.ts";
  +import { ensureDir } from "../deps/fs.ts";
  import { getImportMap, ImportMap, toUrl } from "../core/utils.ts";
  interface Options {
  @@ -20,8 +22,8 @@ export default async function importMap({ file }: Options) {
  importMap = getImportMap();
  }
  + await ensureDir(dirname(file));
  await Deno.writeTextFile(file, JSON.stringify(importMap, null, 2));
  - console.log();
  if (updated) {
  console.log(brightGreen("Updated the file"), file);
  