Replace fast-deep-equal with Node.js built-in

[jonahsnider]

Remove the fast-deep-equal dependency, replacing it with Node's built-in util library.

[coveralls]

Pull Request Test Coverage Report for Build 9900405988

Details

• 4 of 4 (100.0%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 34.765%

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Totals
Change from base Build 9848741379:	0.0%
Covered Lines:	1190
Relevant Lines:	3084

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💛 - Coveralls

[hjdhjd]

I would not recommend this change. While functionally identical, these are core tests that are key in ensuring ciao is highly performant. fast-deep-equal is a couple of orders of magnitude faster...and given how often these checks will occur, it's a real performance hit. 😄 Here's just one performance benchmark...but there are lots of others out there: https://blog.alexefimenko.com/posts/compare-objects

Comparing objects is hard stuff because the structures are so funky. We'd almost be better off creating a completely bespoke version for ciao for the use cases we need that might squeeze out a shade more performance...but that's a project for another day.

TL;DR: I would not recommend we do this for performance considerations unless we have data otherwise.