timers: add non-boolean ref test setImmediate

[RaisinTen]

I added a test to improve the coverage here:

node/lib/timers/promises.js

Lines 96 to 102 in bec918f

	if (typeof ref !== 'boolean') {
	return PromiseReject(
	new ERR_INVALID_ARG_TYPE(
	'options.ref',
	'boolean',
	ref));
	}

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

[Trott]

LGTM but I think it's a duplicate of #35852.

[RaisinTen]

@Trott 🤦 I forgot to check before I made the PR. Whoops! Should I close it?

[Trott]

@Trott 🤦 I forgot to check before I made the PR. Whoops! Should I close it?

In this case, yeah, probably.