fix missing return types on Column

Tests/Fixtures/Column.php

@@ -11,20 +11,20 @@
 
 namespace Propel\Bundle\PropelBundle\Tests\Fixtures;
 
 class Column extends \ColumnMap
 {
     public function __construct(private $name, protected $type)
     {
         $this->phpName = ucfirst($this->name);
     }
 
-    public function isText()
+    public function isText(): bool
     {
         if (!$this->type) {
             return false;
         }
         return match ($this->type) {
             \PropelColumnTypes::CHAR, \PropelColumnTypes::VARCHAR, \PropelColumnTypes::LONGVARCHAR, \PropelColumnTypes::BLOB, \PropelColumnTypes::CLOB, \PropelColumnTypes::CLOB_EMU => true,
             default => false,
         };
     }
@@ -34,7 +34,7 @@
         return $this->isText() ? 255 : 0;
     }
 
-    public function isNotNull()
+    public function isNotNull(): bool
     {
         return 'id' === $this->name;
     }