fix: Fix failing tests for WP 6.4

[gchtr]

Issue

With the release of WordPress 6.4, we’re running into lots of errors.

Solution

Turns out that WordPress still always calls the_block_template_skip_link(), which always causes a _deprecated_function() notice. My solution is to add @expectedDeprecated calls.

I also excluded the docs/ folder from the PHPStan checks.

@nlemoine Can we also ignore the docs for the PHP Lint workflow? We’re getting errors there, too: https://github.com/timber/timber/actions/runs/6808609995/job/18513339121?pr=1617.

Impact

Less noise in tests.

Usage Changes

None.

Considerations

Maybe.

Testing

Yes.

[gchtr]

@nlemoine Or wait, now it seems to run fine: https://github.com/timber/timber/actions/runs/6808992662/job/18514424700?pr=2838.

[nlemoine]

Yes, it's fine like this. Thanks for tackling this last hour issue :)

[gchtr]

And now, of course tests fail for lower WordPress versions, because the deprecation is not there. But I think that’s fine for the moment.