Fix SelectTest to enable --exclude-group=DatabaseLive without database
Fix SelectTest to enable --exclude-group=DatabaseLive without database

It seems PHPUnit calls the constructor in SelectTest even if I add `--exclude-group=DatabaseLive`.
So it causes the following error:

An uncaught Exception was encountered

Type:        InvalidArgumentException
Message:     You have not selected a database type to connect to.
Filename:    /.../CodeIgniter4/system/Database/Database.php
Line Number: 75

KundiZ/CodeIgniter4,natanfelles/CodeIgniter4,lonnieezell/CodeIgniter4,butane/CodeIgniter4,ytetsuro/CodeIgniter4,bcit-ci/CodeIgniter4,jim-parry/CodeIgniter4,samsonasik/CodeIgniter4,bcit-ci/CodeIgniter4,samsonasik/CodeIgniter4,EpicKris/CodeIgniter4,butane/CodeIgniter4,lonnieezell/CodeIgniter4,butane/CodeIgniter4,butane/CodeIgniter4,samsonasik/CodeIgniter4,natanfelles/CodeIgniter4,KundiZ/CodeIgniter4,wuzheng40/CodeIgniter4,butane/CodeIgniter4,kenjis/CodeIgniter4,natanfelles/CodeIgniter4,hex-ci/CodeIgniter4,bcit-ci/CodeIgniter4,jim-parry/CodeIgniter4,jim-parry/CodeIgniter4,hex-ci/CodeIgniter4,hex-ci/CodeIgniter4,wuzheng40/CodeIgniter4,lonnieezell/CodeIgniter4,ytetsuro/CodeIgniter4,samsonasik/CodeIgniter4,wuzheng40/CodeIgniter4,natanfelles/CodeIgniter4,kenjis/CodeIgniter4,ytetsuro/CodeIgniter4,lonnieezell/CodeIgniter4,jim-parry/CodeIgniter4,gustavojm/CodeIgniter4,ytetsuro/CodeIgniter4,bcit-ci/CodeIgniter4,EpicKris/CodeIgniter4,JuveLee/CodeIgniter4,JuveLee/CodeIgniter4,JuveLee/CodeIgniter4,hex-ci/CodeIgniter4,KundiZ/CodeIgniter4,jim-parry/CodeIgniter4,wuzheng40/CodeIgniter4,lonnieezell/CodeIgniter4,butane/CodeIgniter4,KundiZ/CodeIgniter4,samsonasik/CodeIgniter4,kenjis/CodeIgniter4,samsonasik/CodeIgniter4,gustavojm/CodeIgniter4,EpicKris/CodeIgniter4,bcit-ci/CodeIgniter4,ytetsuro/CodeIgniter4,lonnieezell/CodeIgniter4,gustavojm/CodeIgniter4,natanfelles/CodeIgniter4,jim-parry/CodeIgniter4,gustavojm/CodeIgniter4,natanfelles/CodeIgniter4,JuveLee/CodeIgniter4,kenjis/CodeIgniter4,ytetsuro/CodeIgniter4,EpicKris/CodeIgniter4,kenjis/CodeIgniter4