adapt test_loaders for exit() call

tests/test_loaders.py

@@ -7,7 +7,7 @@
 @pytest.mark.parametrize("file_name", ["jsonc.json", "json.json"])
 def test_load_jsonc(file_name):
 	# we are mocking sys.exit to check if it has been called
-	with mock.patch("sys.exit") as mock_exit:
+	with mock.patch("builtins.exit") as mock_exit:
 		result = load_jsonc(f"data/{file_name}")
 		if file_name == "jsonc.json":
 			assert result == {"key1": "value1", "key2": 42, "key3": True}
@@ -23,7 +23,7 @@ def test_load_jsonc(file_name):
 @pytest.mark.parametrize("file_name", ["jsonc.json", "json.json"])
 def test_load_json(file_name):
 	# we are mocking sys.exit to check if it has been called
-	with mock.patch("sys.exit") as mock_exit:
+	with mock.patch("builtins.exit") as mock_exit:
 		result = load_json(f"data/{file_name}")
 		if file_name == "jsonc.json":
 			mock_exit.assert_called_once_with(1)