psr Logger needs update

Running cv on civicrm 6.16.5 results in error:

`PHP Fatal error: Declaration of Psr\Log\AbstractLogger::emergency(Stringable|string $message, array $context = []): void must be compatible with Psr\Log\LoggerInterface::emergency($message, array $context = []) in /home/njlp/public_html/libraries/vendor/psr/log/src/LoggerTrait.php on line 18`

Libraries in cv lib/src/Log need update to newer psr interface.

I am running cv version 0.3.71. Civicrm is installed on a Joomla CMS.

Rolling back the civicrm libraries in libraries/vendor/psr/log/src and civicrm/vendor/psr/log/Psr/Log. Is a workaround. I also had to change the file libraries/src/Log/DelegatingPsrLogger.php to use the old interface as well.

Reproduce the failure with cv 0.3.71 against CiviCRM 6.16.5, then inspect the PSR logging files under lib/src/Log, libraries/vendor/psr/log/src, civicrm/vendor/psr/log/Psr/Log, and libraries/src/Log/DelegatingPsrLogger.php. Done means the logger interfaces are compatible and cv no longer raises the reported PHP fatal error without rolling back vendor files.

Written by the indexing model from the issue text.