* Support `expect().toBeValidDate()`
* Support `expect().toContainEqual()`
Also fixes a bug where `expect(new Set()).toContain()` would not work
* Update expect.zig
* docs
* [autofix.ci] apply automated fixes
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Co-authored-by: Dylan Conway <dylan.conway567@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>