pyproject(testing): add simple pytest conf

pyproject.toml

@@ -106,3 +106,10 @@ profile = "black"
 multi_line_output = 3
 line_length = 79
 include_trailing_comma = true
+
+[tool.pytest.ini_options]
+minversion = "6.0"
+addopts = "-ra -q"
+testpaths = [
+    "tests",
+]