Remove dependency on deep-equal

[cloudrac3r]

node.js has a built-in util.isDeepStrictEqual since v9.0.0: https://nodejs.org/docs/latest-v21.x/api/assert.html#assertdeepstrictequalactual-expected-message

This is helpful because the deep-equal package has 50 dependencies, mostly ponyfills. We can make supertape have 34% fewer dependencies and 18% less installed filesize just by using the built in function instead of the deep-equal package.

However, this change makes it go from a loosely equal comparison to a strictly equal comparison, which could affect people's tests. (I had to fix one of mine that was expecting null but actually got undefined.) So a major version bump to v11 will be required.

[coderaiser]

That's interesting idea! I should check this on my tests first, but yes we don't need any ponyfills since node v18 is the lowest version of node supported.

But I don't think we need a major version bump, case with null and undefined looks more like a bug to me.

[coderaiser]

Merged as ebb9d46. Landed in v10.4.0 🎉 .

Thank you!

[cloudrac3r]

Awesome, thanks!