Allow to hook into any writable stream

[pvdlg]

This would add the option streams that would accept an Array of Writable streams. By default if would be:

• [process.stdout, process.stderr] when calling hookStd([options], transform)
• [process.stdout] when calling hookStd.stdout([options], transform)
• [process.stderr] when calling hookStd.stderr([options], transform)

The library would then do the same usual, but would get the stream to hook into fro m the new option rather than from process.

[sindresorhus]

Seems like a good option to have. What is your use-case?

It is a little bit weird that hookStd.stdout({streams: [process.stderr]}) would be allowed. Should we maybe contain the option to the main hookStd()? Or do you have a use-case I'm not seeing?

[pvdlg]

I guess when using hookStd.stdout and hookStd.stderr the streams option will be ignored.

The use case is to use a transform function to replace sensitive text from the console output. I also want the user to be able to customize the stdout and stderr used by the library and ultimately pass them to signale.

[sindresorhus]

I guess when using hookStd.stdout and hookStd.stderr the streams option will be ignored.

👍

[sindresorhus]

Alright. PR welcome :)

[pvdlg]

Here is the PR: #19