fix!: update composer.json specifics

The URLs in the composer.json file have been updated from http to https, ensuring a secure connection. The required PHP version and the version of quiqqer/core have also been defined, ensuring expected behavior even after potential updates or changes.

BREAKING CHANGE: quiqqer/core v2

mentioned in commit 59c58694

merged

This MR is included in version 2.0.0

The release is available on GitLab release.

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