syntax error typed properties not compatible with php 7.3

@g.mustapha. Thanks for picking this up. I will apply this to the existing 8.x-1.x branch, but this change will not be in the 2.0.x branch that is being created to support D10 development.

happy to contribute :)

@g.mustapha Thanks for the offer, but the reason that the patch will not be in the 2.0.x branch is that D10 does not support older versions of PHP. It requires at least PHP 8.1, with 8.1.6 and above recommended.

Automatically closed - issue fixed for 2 weeks with no activity.

At this point, when Drupal 8 and 9 are out-of-support, it would be reasonable to drop pre-Drupal 10 support and revert this change.

yeh true