Remove Deno.Signals enum

[ry]

Fixes #11900

[kitsonk]

Using a string literal union, while it would still allow some unsupported signals, would greatly improve usability in editors. For example:

export type Signal = "SIGHUP" | "SIGINT";

export function kill(signal: Signal): void;

[caspervonb]

Wonder if these should be case insensitive ala dom events?

[ry]

@caspervonb I think it would just be more work - given the Signal string literal union, I think it will be clear that upper case is expected.

[caspervonb]

@caspervonb I think it would just be more work - given the Signal string literal union, I think it will be clear that upper case is expected.

Would only be s.to_uppercase() call in the match but don't care that much, was just a passing thought.

[bartlomieju]

LGTM from me

[kt3k]

LGTM