feat: support Triple-Slash Lib Directives

[KnorpelSenf]

Problem

When using web workers, one needs to use

/// <reference no-default-lib="true" />
/// <reference lib="deno.worker" />

to make the code compile on Deno.

However, when this is transformed to Node, there is no way to add a built-in library. Hence, the following error is thrown:

src/worker.ts:2:21 - error TS2726: Cannot find lib definition for 'deno.worker'.

2 /// <reference lib="deno.worker" />
                      ~~~~~~~~~~~

TypeScript 4.9.4
Found 1 errors.

Possible Solutions

1. Always remove /// <reference lib="deno.worker" /> from source files.
2. Allow "shimming" built-in libs, so we could create a file deno.worker with the necessary type definitions

Useful Links

• Blocked PQ: https://github.com/grammyjs/runner/pull/10
• TS docs on /// directives for built-in libs: https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-reference-lib-

[KnorpelSenf]

I'm stupid. Solution 1 can already be used by moving the /// directive to the Deno-specific code. Thanks for @MKRhere for pointing this out. Closing.