fix: Autowire and autoconfigure services in chill_main.

src/Bundle/ChillMainBundle/config/services/serializer.yaml

@@ -1,11 +1,13 @@
 ---
 services:
+    _defaults:
+        autowire: true
+        autoconfigure: true
 
     # note: the autowiring for serializers and normalizers is declared
     # into ../services.yaml
 
     Chill\MainBundle\Serializer\Normalizer\DoctrineExistingEntityNormalizer:
-        autowire: true
         tags:
             - { name: 'serializer.normalizer', priority: 8 }