Fix Python 3.9 compatibility for type annotations

Add `from __future__ import annotations` to klayout_drc.py,
logging.py, and gpio_defines.py to support `X | None` syntax
on Python 3.9 (used in the Docker image).

Made-with: Cursor

Author: marwaneltoukhy

src/cf_precheck/__init__.py

@@ -1 +1 @@
-__version__ = "1.0.1"
+__version__ = "1.0.2"

src/cf_precheck/checks/gpio_defines.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 import os
 import re

src/cf_precheck/checks/klayout_drc.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 import os
 import subprocess

src/cf_precheck/logging.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 import sys
 from pathlib import Path