Merge pull request #8 from maximehuran/feature/correct-channel-form

Make getExtendedTypes static to be compatible to Symfony 5

Author: maximehuran

src/Form/Extension/ChannelTypeExtension.php

@@ -35,7 +35,7 @@ public function buildForm(FormBuilderInterface $builder, array $options): void
         ;
     }
 
-    public function getExtendedTypes(): array
+    public static function getExtendedTypes(): array
     {
         return [ChannelType::class];
     }