Pytest warnings JUnit XML Format
See the following in CI:

```
pytest -m "not slow and not network" -n auto --dist=loadfile -s --strict --durations=10 --junitxml=test-data.xml pandas
##[warning]The 'junit_family' default value will change to 'xunit2' in pytest 6.0.
Add 'junit_family=legacy' to your pytest.ini file to silence this warning and make your suite compatible.
```

Unsure if the xunit2.0 format will affect any of our coverage etc..

https://docs.pytest.org/en/latest/reference.html#confval-junit_family