Cachetool 6.1.1 self-update fails

[onlime]

Using self:update to update Cachetool worked fine in the past. But since 6.1.1 (or since recently - only running self-update once a week) I get:

$ cachetool --version
CacheTool 6.1.1

$ cachetool -q self:update

Fatal error: Uncaught TypeError: Return value of "SelfUpdate\SelfUpdateCommand::execute()" must be of the type int, "null" returned. in phar:///usr/local/bin/cachetool.phar/vendor/symfony/console/Command/Command.php:258
Stack trace:
#0 phar:///usr/local/bin/cachetool.phar/vendor/symfony/console/Application.php(971): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#1 phar:///usr/local/bin/cachetool.phar/src/Console/Application.php(141): Symfony\Component\Console\Application->doRunCommand(Object(SelfUpdate\SelfUpdateCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#2 phar:///usr/local/bin/cachetool.phar/vendor/symfony/console/Application.php(290): CacheTool\Console\Application->doRunCommand(Object(SelfUpdate\SelfUpdateCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#3 phar:///usr/local in phar:///usr/local/bin/cachetool.phar/vendor/symfony/console/Command/Command.php on line 258

This runs on a Debian Buster with PHP 7.4:

$ /usr/bin/env php --version
PHP 7.4.14 (cli) (built: Jan 12 2021 13:59:46) ( NTS )

might be related to #172

BTW, could you please also introduce a self-update alias for self:update, as most other tools (Composer, Symfony CLI,...) provide this.

[gordalina]

Fixed in v6.1.2