Log Message:
py-tox: updated to 3.0.0

3.0.0:
Bugfixes
Write directly to stdout buffer if possible to prevent str vs bytes issues
fix 672 reporting to json file when skip-missing-interpreters option is used
avoid Requested Python version (X.Y) not installed stderr output when a Python \ 
environment is looked up using the py Python launcher on Windows and the \ 
environment is not found installed on the system
Fixed an issue where invocation of tox from the Python package, where invocation \ 
errors (failed actions) occur results in a change in the sys.stdout stream \ 
encoding in Python 3.x. New behaviour is that sys.stdout is reset back to its \ 
original encoding after invocation errors
The reading of command output sometimes failed with IOError: [Errno 0] Error on \ 
Windows, this was fixed by using a simpler method to update the read buffers.
(only affected rc releases) fix up tox.cmdline to be callable without args
(only affected rc releases) Revert breaking change of tox.cmdline not callable \ 
with no args
(only affected rc releases) fix 755 by reverting the cmdline import to the old \ 
location and changing the entry point instead

Features
tox displays exit code together with InvocationError
Hint for possible signal upon InvocationError, on posix systems
Add a -q option to progressively silence tox’s output. For each time you \ 
specify -q to tox, the output provided by tox reduces. This option allows you to \ 
see only your command output without the default verbosity of what tox is doing. \ 
This also counter-acts usage of -v. For example, running tox -v -q ... will \ 
provide you with the default verbosity. tox -vv -q is equivalent to tox -v. By \ 
@sigmavirus24
add support for negated factor conditions, e.g. !dev: production_log
Headings like installed: <packages> will not be printed if there is no \ 
output to display after the :, unless verbosity is set. By @cryvate
Allow spaces in command line options to pip in deps. Where previously only \ 
deps=-rreq.txt and deps=--requirement=req.txt worked, now also deps=-r req.txt \ 
and deps=--requirement req.txt work
drop Python 2.6 and 3.3 support: setuptools dropped supporting these, and as we \ 
depend on it we’ll follow up with doing the same (use tox <= 2.9.1 if you \ 
still need this support)
Add tox_runenvreport as a possible plugin, allowing the overriding of the \ 
default behaviour to execute a command to get the installed packages within a \ 
virtual environment
Forward PROCESSOR_ARCHITECTURE by default on Windows to fix platform.machine().