rename 'enabled' to 'active'

database/migrations/2017_06_08_191703_create_airlines_table.php

@@ -17,7 +17,7 @@ class CreateAirlinesTable extends Migration
             $table->increments('id');
             $table->string('code');
             $table->string('name');
-            $table->boolean('enabled');
+            $table->boolean('active');
             $table->timestamps();
             $table->softDeletes();
         });