bug #3806 #3805 stop phpunit warning of no tests in abstract class (C…

…hangePlaces)

This PR was merged into the 3.0.x-dev branch.

Discussion
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#3805 stop phpunit warning of no tests in abstract class

see  #3805

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3a0bd04 #3805 shuts phpunit up complaining of no tests in abstract class

tests/Field/AbstractFieldTest.php

@@ -14,7 +14,7 @@
 use EasyCorp\Bundle\EasyAdminBundle\Field\DateTimeField;
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
 
-class AbstractFieldTest extends KernelTestCase
+abstract class AbstractFieldTest extends KernelTestCase
 {
     protected $entityDto;
     protected $adminContext;