Log Message:
py-test-xdist: updated to 1.29.0

pytest-xdist 1.29.0:

Features
- --max-worker-restart now assumes a more reasonable value (4 times the number of
  nodes) when not given explicitly. This prevents test suites from running \ 
forever when the suite crashes during collection.

- When the test session is interrupted due to running out of workers, the reason \ 
is shown in the test summary
  for easier viewing.
- Compatibility fix for upcoming pytest 5.0: session.exitstatus is now an \ 
IntEnum object.

Bug Fixes
- No longer show an internal error when we run out of workers due to crashes.