The currently deployed PHP (not Rust) version refers to old PHPUnit version.
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Updating dependencies
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires phpunit/phpunit ^6.4 -> satisfiable by phpunit/phpunit[6.4.0, ..., 6.5.14].
- phpunit/phpunit[6.4.0, ..., 6.5.14] require php ^7.0 -> your php version (8.2.24) does not satisfy that requirement.