Add stdio options to spawn

[benjamin-wilkins]

This adds the option to pass a stdio argument to spawn(). This allows you to interact more with the child process. For example, in Deno, you can pass the host process's stdio with:

import { spawn } from "@cross/utils";

spawn(["<COMMAND>"], {}, undefined, {
  stdin: Deno.stdin.readable,
  stdout: Deno.stdout.writable,
  stderr: Deno.stderr.writable,
});

This is fully backwards-compatible - if this argument is omitted it should run identically to the current version of @cross/utils.

I also removed the Deno and Bun implementations as both have decent Node compatibility covering spawn(), with just one quite small polyfill required in Bun.

Separately, I've also added an @cross/utils/stdio module to get the current process's stdio streams more easily across platforms (again, the Node API is mostly compatible with all 3 runtimes, though a small polyfill is again required for Bun) . With this, the above can be rewritten like this:

import { spawn, stdin, stdout, stderr } from "@cross/utils";

spawn(["<COMMAND>"], {}, undefined, {
  stdin: stdin(),
  stdout: stdout(),
  stderr: stderr(),
});

[benjamin-wilkins]

Added inherit option from Node, which allows direct passing to the parent stdio, without passing through JS (which appears to garble arrow keys etc.). This works better if you're calling a separate CLI in a subprocess.

[benjamin-wilkins]

Example from above:

spawn(["<COMMAND>"], {}, undefined, {
  stdin: "inherit",
  stdout: "inherit",
  stderr: "inherit",
});

[Hexagon]

Interesting, great work! Will review this asap.

[benjamin-wilkins]

That should be fixed now

[Hexagon]

Run deno task check to run all CI tests locally 👍

[benjamin-wilkins]

Passing locally now

[Hexagon]

Released through 0.15.0 🎉