serving lib.deno.d.ts<br />
      visit
        <a href="/builtin/stable">/builtin/stable</a>,
        <a href="/builtin/v1.9.0">/builtin/v1.9.0</a>, for example<br />
      <br />
      <a href="https://github.com/kt3k/proxy-d-ts">GitHub</a>