minor fixes

database/migrations/2020_05_05_083641_create_milestone_tasks_table.php

@@ -20,6 +20,7 @@ class CreateMilestoneTasksTable extends Migration
             $table->unsignedBigInteger('type_id');
             $table->string('title');
             $table->string('description')->nullable();
+            $table->integer('order');
             $table->timestamps();
             $table->softDeletes();
             $table->foreign('milestone_id')->references('id')->on('milestones');