License incompatibility issue

# Issue report
Project is licensed under the Apache 2.0 license. In the file below a GPL V3 or later has been found in our compliance check. The header reads:

```
/**
* moodle_sniffs_controlstructureblanklinesniff
*
* Checks that there is a blank line before control structures
*
* @copyright 2009 Nicolas Connault
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
```

## URL or PR where issue occurs
stock-api-libphp/libs/phpcs-psr2-stock/PSR2Stock/Sniffs/ControlStructures/ControlStructureBlankLineSniff.php /

## Brief description of issue

The GPL license is incompatible with the Apache license.

## Proposed fix (if applicable)

Fix license issue.