Add rule isValueOf

[ealush]

Add a new rule that checks whether a value is a value in an object.

enforce("Bravo").isValueOf({
	a: "Alpha",
	b: "Bravo",
  	c: "Charlie",
});

It should pass if the value passed to enforce is a value in the passed object.

To start:

1. Add the new rule file under https://github.com/ealush/vest/tree/latest/packages/n4s/src/rules
2. Add tests for that rule under https://github.com/ealush/vest/tree/latest/packages/n4s/src/rules/__tests__
3. Reference and export that rule here https://github.com/ealush/vest/blob/latest/packages/n4s/src/runtime/rules.ts

[davidmeirlevy]

I’ll take that :)

[ealush]

Awesome. Let me know if you have any questions.

[saard]

@ealush is something wrong with my PR?
#760

[davidmeirlevy]

Maybe @ealush didn't notice this PR is connected to that issue.
@ealush his PR looks fine. I would maybe add some more tests cases, but that's all.

[ealush]

Thanks @davidmeirlevy, yeah, it seems that you both reacted to this issue at the same time, @saard through a PR and you here. No worries.