Fix default value for subject_alternative_names

Author: oriondevelops

database/migrations/add_lets_encrypt_certificates_subject_alternative_names.php.stub

@@ -2,14 +2,15 @@
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Query\Expression;
 use Illuminate\Support\Facades\Schema;
 
 class AddLetsEncryptCertificatesSubjectAlternativeNames extends Migration
 {
     public function up()
     {
         Schema::table('lets_encrypt_certificates', function (Blueprint $table) {
-            $table->json('subject_alternative_names')->default('[]')->after('domain');
+            $table->json('subject_alternative_names')->default(new Expression('(JSON_ARRAY())'))->after('domain');
         });
     }