Add deadline support

Deadline was already supported when creating and updating tasks
since the migration to the Todoist API v1.

It is now also returned on the Task object.

Closes #165

Author: goncalossilva

tests/data/test_defaults.py

@@ -26,6 +26,11 @@ class PaginatedItems(TypedDict):
     "is_recurring": True,
 }
 
+DEFAULT_DEADLINE_RESPONSE = {
+    "date": "2016-09-01",
+    "lang": "en",
+}
+
 DEFAULT_DURATION_RESPONSE = {
     "amount": 60,
     "unit": "minute",
@@ -88,6 +93,7 @@ class PaginatedItems(TypedDict):
     "labels": [],
     "priority": 1,
     "due": DEFAULT_DUE_RESPONSE,
+    "deadline": DEFAULT_DEADLINE_RESPONSE,
     "duration": DEFAULT_DURATION_RESPONSE,
     "collapsed": False,
     "child_order": 3,

todoist_api_python/models.py

@@ -74,6 +74,15 @@ class _(JSONPyWizard.Meta):  # noqa:N801
     timezone: str | None = None
 
 
+@dataclass
+class Deadline(JSONPyWizard):
+    class _(JSONPyWizard.Meta):  # noqa:N801
+        v1 = True
+
+    date: ApiDue
+    lang: str = "en"
+
+
 @dataclass
 class Meta(JSONPyWizard):
     class _(JSONPyWizard.Meta):  # noqa:N801
@@ -100,6 +109,7 @@ class _(JSONPyWizard.Meta):  # noqa:N801
     labels: list[str] | None
     priority: int
     due: Due | None
+    deadline: Deadline | None
     duration: Duration | None
     is_collapsed: Annotated[bool, Alias(load=("collapsed", "is_collapsed"))]
     order: Annotated[int, Alias(load=("child_order", "order"))]