update version compability

checkprestabox.php

@@ -27,7 +27,7 @@ class CheckPrestaBox extends Module
         $this->description = $this->trans('Accept payments for your products via Checkbox service.');
         $this->confirmUninstall = $this->trans('Are you sure about removing these details?');
         $this->ps_versions_compliancy = array(
-            'min' => '9.0',
+            'min' => '8.0',
             'max' => _PS_VERSION_,
         );
     }