feat: replaced fast-deep-equal with fast-equals

[byt3sage]

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Fixes #610 🦕

Hey!
Given the state of fast-deep-equal and the fact I really would like ESM support, I've taken it upon myself to replace fast-deep-equal with fast-equals which is a much more maintained library https://github.com/planttheidea/fast-equals.

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[byt3sage]

@wangela would it be at all possible for a review please?