It turns out that when I switched us from `assert` to `assert.strict`,
I didn't actually update any existing tests or tell anyone:
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So apparently everyone else just kept on using `strictEqual`.
This will be a PR and also throw an error if people continue trying to
use it, which should make it much clearer what PS policy is on this.
A lot of the problem may be that TypeScript marks assert.strict.equal
as deprecated when it's not. This was fixed 4 days ago:
https://github.com/DefinitelyTyped/DefinitelyTyped/pull/48452
But this probably hasn't made it to a thing yet. Until then, you'll
have to deal with TS marking your tests as deprecated, but it shouldn't
be too long.
Accidentally using `assert` instead of `assert.strict` should now show
an error. This protects against the probably much worse mistake of
accidentally using `assert.equal` rather than `assert.strict.equal`.
`assert.ok` is also deprecated now.
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