Add PostgreSQL Support (#3)

Reviewed-on: #3

tests/unit/FieldMatchTest.php

@@ -3,11 +3,13 @@
 namespace Test\Unit;
 
 use BitBadger\PDODocument\FieldMatch;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the FieldMatch enum
  */
+#[TestDox('Field Match (Unit tests)')]
 class FieldMatchTest extends TestCase
 {
     public function testToStringSucceedsForAll(): void