fix tests

Author: hafezdivandari

tests/Migration/TableTest.php

@@ -4,6 +4,7 @@
 
 namespace Tpetry\PostgresqlEnhanced\Tests\Migration;
 
+use Composer\Semver\Comparator;
 use Tpetry\PostgresqlEnhanced\Schema\Blueprint;
 use Tpetry\PostgresqlEnhanced\Support\Facades\Schema;
 use Tpetry\PostgresqlEnhanced\Tests\TestCase;