This commit addresses three major updates in our Memberships module:

1. In Handler.php, we clarified the return type of `isLinkedToContracts()` method by explicitly
defining it as boolean.
2. In AbstractMembershipUserLinkVerificationHandler.php, we simplified the Exception import and
updated the type in the `getMembershipUser()` method's doc comment.
3. In MembershipUser.php, the constructors for `CancelVerification` and `AbortCancelVerification`
are now called without the user id.

These changes enhance code readability and maintainability while ensuring safer calls.

This commit improves the type consistency and readability of the code in the Membership class and
related classes. The changes include adding strict types, removing unused imports, using type
hinting, and replacing old switch-case syntax with match expressions.

Specifically, it changes the signature of several functions, adds and removes some class imports,
and replaces old style function syntax with modern type hinting for better readability and
maintainability. Moreover, it adds PHP built-in functions instead of using their fully qualified
form. It also improves readability by replacing the switch-case syntax with the new and more
convenient match expression when parsing intervals from the duration.

The phive configuration has been updated to reflect the new version of phpstan that is being used.
The version has been changed from 1.11.8 to a generic 1.* with the installed version now at 1.12.13.

(cherry picked from commit 7ccb4fbd)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 29ece0ed)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 31ef9697)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 16e44cb5)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 68ccf614)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit b74cc654)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 4e5739b3)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 5ace2927)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit f1ec8fca)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit 71e30a0a)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

(cherry picked from commit f310f6a6)

Co-authored-by: Jan Wennrich <jan.wennrich@pcsg.de>

BREAKING CHANGE: changed requirements and code for quiqqer/core v2

Dev

See merge request !4

feat: new versioning

See merge request !2