Log Message:
py-test: updated to 4.6.3

pytest 4.6.3:
Bug Fixes
* -q has again an impact on the style of the collected items (--collect-only) \ 
when --log-cli-level is used.
* Fix regressions of 5063 for importlib_metadata.PathDistribution which have \ 
their files attribute being None.
* Fix regression where the obj attribute of TestCase items was no longer bound \ 
to methods.