some more mypy issues

src/spiffworkflow_backend/models/task.py

@@ -1,6 +1,6 @@
 """Task."""
 import enum
-from typing import Any
+from typing import Any, Union
 
 import marshmallow
 from marshmallow import Schema
@@ -101,18 +101,18 @@ class Task:
         title: str,
         type: str,
         state: str,
-        lane: str | None = None,
+        lane: Union[str, None] = None,
         form: None = None,
         documentation: str = "",
         data: dict[str, Any] | None = None,
-        multi_instance_type: MultiInstanceType | None = None,
+        multi_instance_type: Union[MultiInstanceType, None] = None,
         multi_instance_count: str = "",
         multi_instance_index: str = "",
         process_name: str = "",
-        properties: dict | None = None,
-        process_instance_id: int | None = None,
-        form_schema: str | None = None,
-        form_ui_schema: str | None = None,
+        properties: Union[dict, None] = None,
+        process_instance_id: Union[int, None] = None,
+        form_schema: Union[str, None] = None,
+        form_ui_schema: Union[str, None] = None,
     ):
         """__init__."""
         self.id = id

src/spiffworkflow_backend/routes/process_api_blueprint.py

@@ -793,7 +793,7 @@ def get_value_from_array_with_index(array: list, index: int) -> Any:
 
 
 def prepare_form_data(
-    form_file: str, task_data: dict | None, process_model: ProcessModelInfo
+    form_file: str, task_data: Union[dict, None], process_model: ProcessModelInfo
 ) -> str:
     """Prepare_form_data."""
     if task_data is None:
@@ -812,7 +812,7 @@ def prepare_form_data(
 def get_spiff_task_from_process_instance(
     task_id: str,
     process_instance: ProcessInstanceModel,
-    processor: ProcessInstanceProcessor | None = None,
+    processor: Union[ProcessInstanceProcessor, None] = None,
 ) -> SpiffTask:
     """Get_spiff_task_from_process_instance."""
     if processor is None: