Jump to Symfony 3.4

Thanks to the BC compatibility, almost nothing have to be changed.
All changes are related to new bundle version of:
- SensioFrameworkExtraBundle
- DoctrineFixturesBundle

src/Wallabag/ImportBundle/Resources/config/services.yml

@@ -112,3 +112,11 @@ services:
             - [ setLogger, [ "@logger" ]]
         tags:
             -  { name: wallabag_import.import, alias: chrome }
+
+    wallabag_import.command.import:
+        class: Wallabag\ImportBundle\Command\ImportCommand
+        tags: ['console.command']
+
+    wallabag_import.command.redis_worker:
+        class: Wallabag\ImportBundle\Command\RedisWorkerCommand
+        tags: ['console.command']