Log Message:
py-tox: updated to 3.5.2

v3.5.2:
Bugfixes
- session packages are now put inside a numbered directory (instead of prefix \ 
numbering it,
  because pip fails when wheels are not named according to PEP-491 , and prefix \ 
numbering messes with this)

Features
- level three verbosity (-vvv) show the packaging output

v3.5.1:
Bugfixes
- fix regression with 3.5.0: specifying --installpkg raises AttributeError: \ 
'str' object has no attribute 'basename'

v3.5.0:
Bugfixes
- intermittent failures with --parallel--safe-build, instead of mangling with \ 
the file paths now uses a lock to make the package build operation thread safe \ 
and is now on by default (--parallel--safe-build is now deprecated)

Features
- Added temp_dir folder configuration (defaults to {toxworkdir}/.tmp) that \ 
contains tox
  temporary files. Package builds now create a hard link (if possible, otherwise \ 
copy - notably in
  case of Windows Python 2.7) to the built file, and feed that file downstream \ 
(e.g. for pip to
  install it). The hard link is removed at the end of the run (what it points \ 
though is kept
  inside distdir). This ensures that a tox session operates on the same package \ 
it built, even
  if a parallel tox run builds another version. Note distdir will contain only \ 
the last built
  package in such cases.