[WILDCARD]
error: TS2339 [ERROR]: Property 'umask' does not exist on type 'typeof Deno'. 'Deno.umask' is an unstable API. Did you forget to run with the '--unstable' flag? If not, try changing the 'lib' compiler option to include 'deno.unstable' or add a triple-slash directive to the top of your entrypoint (main file): /// <reference lib="deno.unstable" />
console.log(Deno.umask);
                 ~~~~~
    at [WILDCARD]/unstable.ts:1:18