132 whip php 81 improvements

[vraja-pro]

Context

• Remove filter_input usage.

Summary

This PR can be summarized in the following changelog entry:

• Removes filter_input usage for PHP 8.1 improvements.

Relevant technical choices:

• Wrapped the wp_verify_nonce in the Whip_MessageDismisser for testing purposes.

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• This PR has only unit tests.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes #132

[coveralls]

Pull Request Test Coverage Report for Build 5678878861

• 3 of 4 (75.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+5.2%) to 27.801%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Whip_MessageDismisser.php	0	1	0.0%

Totals
Change from base Build 5066286864:	5.2%
Covered Lines:	67
Relevant Lines:	241

---

💛 - Coveralls

[thijsoo]

Looks good to me CR 👍