upgrade phpunit: make data provider static

src/Bundle/ChillMainBundle/Tests/Serializer/Normalizer/DateNormalizerTest.php

@@ -32,7 +32,7 @@ final class DateNormalizerTest extends KernelTestCase
         $this->prophet = new Prophet();
     }
 
-    public function generateDataNormalize()
+    public static function generateDataNormalize()
     {
         $datetime = \DateTime::createFromFormat('Y-m-d H:i:sO', '2021-06-05 15:05:01+02:00');
         $date = \DateTime::createFromFormat('Y-m-d H:i:sO', '2021-06-05 00:00:00+02:00');

src/Bundle/ChillMainBundle/Tests/Serializer/Normalizer/DoctrineExistingEntityNormalizerTest.php

@@ -35,7 +35,7 @@ final class DoctrineExistingEntityNormalizerTest extends KernelTestCase
         $this->normalizer = new DoctrineExistingEntityNormalizer($em, $serializerFactory);
     }
 
-    public function dataProviderUserId()
+    public static function dataProviderUserId()
     {
         self::bootKernel();
 

src/Bundle/ChillMainBundle/Tests/Serializer/Normalizer/PhonenumberNormalizerTest.php

@@ -28,7 +28,7 @@ final class PhonenumberNormalizerTest extends TestCase
 {
     use ProphecyTrait;
 
-    public function dataProviderNormalizePhonenumber()
+    public static function dataProviderNormalizePhonenumber()
     {
         $phonenumberUtil = PhoneNumberUtil::getInstance();
 

src/Bundle/ChillMainBundle/Tests/Serializer/Normalizer/UserNormalizerTest.php

@@ -40,7 +40,7 @@ final class UserNormalizerTest extends TestCase
     /**
      * @throws NumberParseException
      */
-    public function dataProviderUserNormalizer()
+    public static function dataProviderUserNormalizer()
     {
         $user = new User();
         $userNoPhone = new User();