Merge branch 'feature/article-image' into 'master'

Add new field article.image

See merge request !8

src/GraphQL/Fields.php

@@ -55,6 +55,7 @@ class Fields
         'certificateEmail',
         'certificateExpirationDate',
         'manufacturer' => self::MANUFACTURER,
+        'image' => self::MEDIA,
     ];
 
     public const MANUFACTURER = [