Add apereo/phpcas to standard GLPI build

Please add apereo/phpcas to the standard GLPI build.

As far as I can see, the licensing problem that caused the library to be removed 5 years ago currently does not exist.

https://www.apache.org/licenses/GPL-compatibility.html

composer.json:
...

"ext-zlib": "*",

"apereo/phpcas": "^1.6",

"blueimp/jquery-file-upload": "^10.32",

...