deadline for subtasks

be/app/Http/Resources/SubTaskResource.php

@@ -28,6 +28,7 @@ class SubTaskResource extends JsonResource
             'employee_id' => $this->user->id,
             'duration' => $this->estimated_time,
             'spent_time' => $this->tracked_time,
+            'deadline' => $this->deadline,
             'is_finished' => $this->is_finished,
             'timeblocks' => TimeblockResource::collection($this->timeblocks),
             'timesheets' => TimesheetResource::collection($this->timesheets),