Add integration test

[julien-nc]

• use phpunit 11 to get the external dependency feature (used in integration tests)
• bump min NC version to 33 and max to 34 because phpunit 11 only supports php >= 8.2 and NC 33 is the first to drop support for php 8.1.
• update composer dependencies
• add oauth integration test that performs a full oauth flow with credentials stored as repo secrets (with totp support as we can't perform device validation per email 😁)
• add feature integration tests that depend on the oauth test so we know we have a token stored in the DB