fixes after change to src-layout

tests/conftest.py

@@ -0,0 +1,11 @@
+import pytest
+from typing import Any
+
+
+def pytest_addoption(parser: pytest.Parser) -> None:
+    parser.addoption("--relaxed", action='store_true', help="run tests in relaxed mode")
+
+
+@pytest.fixture
+def relaxed(request: pytest.FixtureRequest) -> Any:
+    return request.config.getoption("--relaxed")

tests/utils.py

@@ -39,7 +39,7 @@ Usage:
 with Capturing() as output:
     print("Output")
 '''
-    # TODO remove type ignore when fixed, see https://github.com/python/mypy/issues/11871, https://stackoverflow.com/questions/72174409/type-hinting-the-return-value-of-a-class-method-that-returns-self
+    # TODO remove type ignore if fixed, see https://github.com/python/mypy/issues/11871, https://stackoverflow.com/questions/72174409/type-hinting-the-return-value-of-a-class-method-that-returns-self
     def __enter__(self):  # type: ignore
         self._stdout = sys.stdout
         sys.stdout = self._stringio_std = io.StringIO()