fix declaration of expiresAt

[pnu]

Declaration of Auth0\WordPress\Cache\WpObjectCacheItem::expiresAt(?DateTimeInterface $expiration) must be compatible with Psr\Cache\CacheItemInterface::expiresAt(?DateTimeInterface $expiration): static

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Description

Missing : static causes an fatal error. This was removed earlier in commit dc59a72

References

https://github.com/php-fig/cache/blob/master/src/CacheItemInterface.php#L89

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not the default branch

[evansims]

Hey @pnu 👋 Thanks for raising this.

Let me investigate a little and see if I can figure out what's going on here that's triggering this error for you. My concern with the PR is that it would be a breaking change for sites with transient dependencies using PSR6 < 3.0, as typing wasn't introduced until that version.

[evansims]

Thanks for your contribution!