Provide conditional method check before run single patch

[muhajirinlpu]

Example syntax

use Dentro\Patcher\Patch;

return new class extends Patch
{
    /**
     * Run patch script.
     *
     * @return void
     */
    public function patch(): void
    {
        //
    }
    
    public function eligible(): boolean
    {
        return false;
    }
};

If eligible() method return false. the patch method will not be called. The output of console will seems like

Patching: 2020_10_09_124616_add_attachment_beep
Skipped: 2020_10_09_124616_add_attachment_beep is not eligible to run in current condition

The reason why we need this :

Patches are often created because of some condition on certain environment, E.g. The staging environment database was broken due to some mistake by developer. But, other developer environments and production are not effected with the bug. So we only need to run this patch on staging environment and in other environments we still can run artisan patcher:run without worry about the error Model with id blablabla not found... that written in patch method.

[muhajirinlpu]

@veelasky need your opinion

[veelasky]

OK,