fix: use tomllib/tomli compat import for Python 3.10 support

Author: Coding-Dev-Tools

tests/test_converter.py

@@ -470,7 +470,10 @@ def test_version_in_init_matches_pyproject(self):
         """pyproject.toml version must match __init__.__version__."""
         from pathlib import Path
 
-        import tomllib
+        try:
+    import tomllib
+except ImportError:
+    import tomli as tomllib  # Python < 3.11 backport
 
         from json2sql import __version__
         pyproject = Path(__file__).resolve().parent.parent / "pyproject.toml"
@@ -479,4 +482,4 @@ def test_version_in_init_matches_pyproject(self):
         assert data["project"]["version"] == __version__, (
             f"pyproject.toml version ({data['project']['version']}) != "
             f"__init__.__version__ ({__version__})"
-        )
+        )