Support PHP8.1

[ChristophWurst]

Describe the task

Same as https://github.com/nextcloud/server/issues/29287 but for our components.

Affected components

• [x] https://github.com/nextcloud/calendar/pull/3996
• [x] https://github.com/nextcloud/calendar_resource_management/pull/46
• [x] https://github.com/nextcloud/contacts/pull/2683
• [x] https://github.com/nextcloud/mail/pull/6131

To do

• [x] Update info.xml requirements
• [x] Update composer.json requirements
• [x] Update test matrix
• [x] Update lint matrix
• [x] Fix the code

[csavur]

Hello,

When are you planning to support php8.1? We are unable to use the nextcloud due to PHP version issue. I hope soon it will support the latest PHP.

Best,

[ChristophWurst]

We will support it when the code is ready.

[darix]

Do you have any ETA when this will be released?

[ChristophWurst]

When the migration is done.