ParseError: syntax error, unexpected ')' in layout_builder_blocks/src/EventSubscriber/BlockComponentRenderArraySubscriber.php on line 79

This module currently requires PHP versions that permit trailing commas in function calls, which was first implemented in PHP 7.3. See: https://wiki.php.net/rfc/trailing-comma-function-calls. While Drupal 9 does require PHP 7.3+, versions of Drupal 8 that this module supports do not. Attempting to install this module with PHP versions < 7.3 will result in errors similar to

ParseError: syntax error, unexpected ')' in layout_builder_blocks/src/EventSubscriber/BlockComponentRenderArraySubscriber.php on line 79.

Options to fix this would include:

1. Refactoring code to not use trailing commas in function calls (and any other PHP <=7.3 breaking changes)
2. Changing the module's core version requirement to only be D9+
3. Noting somewhere that this module requires at least PHP 7.3

Option 3 may be sufficient, however, the issue presented here may also be responsible for #3166059: Unexpected error after installation