Upgrade to PHP 8.2

[marvindurot]

This pull request contains changes for upgrading to PHP 8.2 automated by Rector.

Before merging, you need to:

• Run composer update (if the scripts fail, try with --no-scripts)
• Run your tests suite: vendor/bin/phpunit

To update Composer dependencies with Docker :

docker run --rm --interactive --tty --volume $PWD:/app --user $(id -u):$(id -g) composer install

To build Docker test container :

docker build -t my-test-container .

To run the tests with Docker :

docker run -it --rm --name my-running-script --user $(id -u):$(id -g) \
-v "$PWD":/usr/src/myapp -w /usr/src/myapp my-test-container \
vendor/bin/phpunit tests