Fix the issues reported by PHP_CodeSniffer

The task is fixing what reported by PHP_CodeSniffer. I added the .gitlab-ci.yml file to get a list of the PHP_CodeSniffer errors/warnings, which are still to be fixed.

Thanks @avpaderno - sorry I got that wrong, this looked inactive and the MR only contained that one change. Are you planning to finish this?

I will commit the fix in few minutes. The list of changes is not that long.

@avpaderno would make sense to also fix phpstan and phpcs here, wouldn't it? Then we're done!

@avpaderno I'm maintainer now, so once done I'd be happy to merge the fixed! :)

All the jobs pass.

GREAT work avpaderno!

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