chore: Update PSR container to 2.0.2

[susnux]

As requested per: nextcloud/server#36417 (comment)

This requires updating symfony/service-contracts to 3.x, which is only supported by symfony/console >= 5.4.
Updated both dependencies, php must now be at least 8.0.2.

Companion server PR: nextcloud/server#36617

[ChristophWurst]

Please open a companion server PR so the CI suite tests the bump

[nickvergessen]

Will have to clarify if we can do that. :(

[susnux]

This is required because of symfony/service-contracts : https://github.com/symfony/service-contracts/blob/d78d39c1599bd1188b8e26bb341da52c3c6d8a66/composer.json#L19

(that link should point to the v3 tag)

[nickvergessen]

This is required because of symfony/service-contracts

I guessed so, but Nextcloud 26/27 require PHP 8.0 that is what we announced and told everywhere. We never required a specific patch version later on in the process :/

[susnux]

I am not that into composer configs, but if I understand that setting correctly it just sets a php version for packages. So with this setting only packages supporting php 8.0.2 are installed, but it should not affect the runtime (?)
Meaning it should be still possible to run Nextcloud with e.g. PHP 8.0.1

But as I said this is not my area expertise

[susnux]

@nickvergessen could you clarify if this is possible for NC 27?

[ChristophWurst]

symfony/symfony#41282 (comment) was the original reason for the oddly specific minimum version

[szaimen]

Merge?

[susnux]

I dug through the changes of symphony but there is nothing that depends on that explicit bug fix release.
So it looks the php requirement can be ignored, that setting does not affect runtime, only if you try to run composer to install the dependencies (e.g. CI) with php < 8.0.2 you will need to add (--ignore-platform-reqs).

But as the server PR CIs ran successfully, it seems that is not the case for our CI.