Implement net.Socket#ref for TTY handles

[ulken]

I'm trying to use useStdin() in term.ink but it crashes with:

  ERROR  unreachable

 ext:deno_node/_util/asserts.ts:16:9

 - unreachable (ext:deno_node/_util/asserts.ts:16:9)
 - TTY.ref (ext:deno_node/internal_binding/handle_wrap.ts:38:5)
 - ReadStream.ref (node:net:658:20)
 ...

More specifically, it fails here.

The problem seems to be ref() not being implemented in net.Socket. Being new to Deno, the documentation confuses me, since std / node / net.ts > Socket#ref suggests that it's indeed implemented?

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Reference: #20855 (comment)