fix: add composer error check

[kenjis]

Before: There is no error. We don't know what happened.

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Switched to a new branch 'tatter/scratch'
rm '.editorconfig'
...
rm 'writable/uploads/index.html'
$

After:

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*             STAGING              *
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Switched to a new branch 'tatter/scratch'
rm '.editorconfig'
...
rm 'writable/uploads/index.html'
ERROR 2: Unable to checkout codeigniter4/codeigniter4
Updating dependencies Your requirements could not be resolved to an installable set of packages. Problem 1 - symfony/service-contracts v1.1.2 requires php ^7.1.3 -> your php version (8.2.16) does not satisfy that requirement. - vimeo/psalm 5.15.0 requires symfony/console ^4.1.6 || ^5.0 || ^6.0 -> satisfiable by symfony/console[v5.4.28]. - codeigniter4/devkit v1.1.2 requires vimeo/psalm ^5.0 -> satisfiable by vimeo/psalm[5.15.0]. - symfony/console v5.4.28 requires symfony/service-contracts ^1.1|^2|^3 -> satisfiable by symfony/service-contracts[v1.1.2]. - codeigniter4/devkit is locked to version v1.1.2 and an update of this package was not requested.