Symfony 6 support , php 8 - ] gruzzle 7.5.1

[grekpg]

composer require zvps/royal-mail-shipping-rest-api-client
./composer.json has been updated
Running composer update zvps/royal-mail-shipping-rest-api-client
Loading composer repositories with package information                                                                  Updating dependencies                                 
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires zvps/royal-mail-shipping-rest-api-client * -> satisfiable by zvps/royal-mail-shipping-rest-api-client[dev-master, v1.0, v2.0, v3.0, v3.1, v4.0, v4.1, v4.2, v4.3, v5.0, v5.0.x-dev, v6.0, v6.0.x-dev, v6.1, v6.2, 9999999-dev].
    - zvps/royal-mail-shipping-rest-api-client[dev-master, v1.0, v2.0, v3.0, ..., v3.1, v4.0, ..., v4.3, v5.0, ..., v5.0.x-dev, v6.0, ..., v6.2] require guzzlehttp/guzzle ^6.2 -> found guzzlehttp/guzzle[6.2.0, ..., 6.5.x-dev] but the package is fixed to 7.5.1 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.
You can also try re-running composer require with an explicit version constraint, e.g. "composer require zvps/royal-mail-shipping-rest-api-client:*" to figure out if any version is installable, or "composer require zvps/royal-mail-shipping-rest-api-client:^2.1" if you know which you need.