Update phpunit polyfills to 1.1

[jorgemd24]

Changes proposed in this Pull Request:

See https://github.com/woocommerce/automatewoo/pull/1626

This extension was not updated yet.

Checks:

• Does your code follow the WordPress coding standards?
• Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Screenshots:

Detailed test instructions:

1. Confirm all the unit test pass in this PR for all versions of WP.

Additional details:

Command run to update the package: composer require --dev yoast/phpunit-polyfills:"^1.1.0" && composer install

Changelog entry

Dev - Update phpunit polyfills to 1.1 for WP 6.4

[martynmjones]

Hey @jorgemd24,

Thanks for the update! Tested locally and all tests are passing so LGTM ✅