Fatal error: Access level to Drupal\opigno_learning_path\Plugin\views\filter\OpignoGroupMembershipBoolean::operators() must be public

MR #25 ready for review.

Adding MR !25 as patch.

updating patch as per latest version..

You really do not need to add patches to an issue if there is an MR. In the MR block, there is a "plain diff" link which has a URL to the patch version of the MR. That could be seen as credit gaming.