Bug fixes

This release comes with a bunch of bug fixes, thanks to everyone who contributed.

Updates in this release. Commit hashes provided where appropriate.

Remove dependency on search_api_autocomplete
Issue #3024203 by ankushgautam76@gmail.com: Add Readme file
Issue #3095624 by rpayanm: Add defaultTheme in tests extending BrowserTestBase
Deprecation fix: Support for asserting against non-boolean values in ::assertTrue is deprecated in drupal:8.8.0 and is removed from drupal:9.0.0.

- Undefined index: display_path when adding out of stock product to the wishlist
- Does not check if product is enabled or disabled.
- Undefined index: default_product
- Stock Notification Error - Rules
- Allow cron query to be altered by other modules
- Trigger Rules event on form submit

• New current group statistics block
• Use ECMAScript 2015 (ES6) instead of ECMAScript 2018 to support old browsers
• Code cleanup and coding standards

Fixed config schema definition.
Drupal 9+ support.

Fixed config schema definition.