chore: use from __future__ import annotations

test/test_projects/__init__.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .base import TestProject
 from .c import new_c_project
 

test/test_projects/__main__.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import importlib
 import subprocess
 import sys

test/test_projects/base.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from pathlib import Path
 from typing import Any, Dict, Union
 

test/test_projects/c.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import jinja2
 
 from .base import TestProject