Fix coding style with phpcs PSR-12 standard

Signed-off-by: davidarendsen <davidarendsen@hey.com>

tests/Functions/FilterFunctionTest.php

@@ -1,24 +1,25 @@
 <?php
+
 declare(strict_types=1);
 
+namespace Tests\Functions;
+
 use Arendsen\FluxQueryBuilder\Expression\KeyValue;
 use Arendsen\FluxQueryBuilder\Functions\Filter;
 use PHPUnit\Framework\TestCase;
 
-final class FilterFunctionTest extends TestCase {
-
+final class FilterFunctionTest extends TestCase
+{
     public function testSimpleFilter()
     {
         $expression = new Filter(KeyValue::setEqualTo('_measurement', 'test_measurement')
             ->andEqualTo('_field', 'user')
             ->orEqualTo('_field', 'field2')
-            ->andEqualTo('user', 'my_username')
-        );
+            ->andEqualTo('user', 'my_username'));
 
-        $query = '|> filter(fn: (r) => r._measurement == "test_measurement" and r._field == "user" or ' . 
+        $query = '|> filter(fn: (r) => r._measurement == "test_measurement" and r._field == "user" or ' .
             'r._field == "field2" and r.user == "my_username") ';
 
         $this->assertEquals($expression->__toString(), $query);
     }
-
-}
+}