add an assignee to the settings

tests/test_settings.py

@@ -5,4 +5,5 @@ def test_settings():
     config = settings.read_config("todoist_interface.yml.example")
     assert (config["gitlab"]["token"] == "gitlabtoken"
             and config["gitlab"]["url"] == "https://gitlab.example.com/api/v4/"
-            and config["todoist"]["token"] == "todoisttoken")
+            and config["todoist"]["token"] == "todoisttoken"
+            and config["gitlab"]["assignee"] == "muster")

todoist_interface.yml.example

@@ -1,6 +1,7 @@
 gitlab:
   url: "https://gitlab.example.com/api/v4/"
   token: "gitlabtoken"
+  assignee: "muster"
 
 todoist:
   token: "todoisttoken"