Preparing new version 1.5

[davidperezgar]

Changelog:

• Enhancement - Improve url validation to check duplicate protocol.
• Enhancement - Update severity for incorrect textdomains and i18n error codes.
• Enhancement - Now issues in URL Author check are ERROR instead of WARNING.
• Enhancement - New check for minor version in Tested up.
• Enhancement - Make sure headers are not empty in the requires header check.
• Enhancement - Include experimental option in admin.
• Enhancement - Add Behat test for experimental checks from addons.
• Enhancement - Improve license check for Apache.
• Enhancement - Warn if requires headers are not same in readme and plugin header.
• Fix - Remove warning for dynamic callback in register_setting check.
• Fix - Incorrect database tables being referenced on subsites in Multisite.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: davidperezgar <davidperez@git.wordpress.org>
Co-authored-by: swissspidy <swissspidy@git.wordpress.org>
Co-authored-by: ernilambar <rabmalin@git.wordpress.org>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.