Allow scalar values for Query::select() (#259)

* Update tests according main PR

* Fix psalm issue

* Apply Rector changes (CI)

* Revert "Apply Rector changes (CI)"

This reverts commit 0848775.

* Disable Rector for tests

* Add type string to test

---------

Co-authored-by: Tigrov <Tigrov@users.noreply.github.com>
Co-authored-by: Sergei Predvoditelev <sergei@predvoditelev.ru>

tests/QueryBuilderTest.php

@@ -664,4 +664,10 @@ public function testDefaultValues(): void
             $queryBuilder->insert('negative_default_values', []),
         );
     }
+
+    /** @dataProvider \Yiisoft\Db\Oracle\Tests\Provider\QueryBuilderProvider::selectScalar */
+    public function testSelectScalar(array|bool|float|int|string $columns, string $expected): void
+    {
+        parent::testSelectScalar($columns, $expected);
+    }
 }