Merged in feature/PMC-877 (pull request #6950)

PMC-877: Upgrade Laravel Framework to version 5.7

Approved-by: Julio Cesar Laura Avendaño <contact@julio-laura.com>
Approved-by: Mauricio Veliz <mauricio@processmaker.com>

workflow/engine/classes/model/Process.php

@@ -746,7 +746,13 @@ class Process extends BaseProcess
         return $aProcesses;
     }
 
-    public function getCasesCountForProcess($pro_uid)
+    /**
+     * This returns the number of cases for the process.
+     * @param string $pro_uid
+     * @return integer
+     * @see ProcessMaker\Project\Bpmn::canRemove()
+     */
+    public static function getCasesCountForProcess($pro_uid)
     {
         $oCriteria = new Criteria('workflow');
         $oCriteria->addSelectColumn('COUNT(*) AS TOTAL_CASES');