Republish of v5.0.6 but with node-gyp-v5.0.6.tar.gz removed from pack file

PR-URL: #1972

PR-URL: #1971
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

PR-URL: #1985
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

Running Python standalone tests on multiple OSes would free up Travis CI for tests of various combinations of Node.js and Python as well as tests on other [CPU architectures](https://docs.travis-ci.com/user/multi-cpu-architectures).  __arch: amd64, arm64, ppc64le, s390x__

PR-URL: #1985
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

Uses `pyenv` to manage MacOS python versions since its not included
in the environment.

rvagg: landing this from #1979 even though it wasn't from the original
author. Treating approval there as approval of this commit too.

PR-URL: #1979
Reviewed-By: Rod Vagg <rod@vagg.org>

Reorder Travis builds by OS. Replace `pyenv global` calls with
properly set `PATH` and `PYENV_VERSION` env vars. Does not
assume python modules are in the `PATH` so all python
modules are prefixed with `python -m`.

PR-URL: #1979
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

PR-URL: #1978
Reviewed-By: Rod Vagg <rod@vagg.org>

PR-URL: #2001
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

PR-URL: #1996
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

PR-URL: #1992
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

PR-URL: #1993
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

PR-URL: #1994
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

Fixes #1998

Reviewed-By: Rod Vagg <rod@vagg.org>
PR-URL: #2009

Fixes: #2005
Reviewed-By: Rod Vagg <rod@vagg.org>
PR-URL: #2006

I have quite a few instances of VS installed and it looks like
Find-VisualStudio.cs enumerates all of them, even when
find-visualstudio.js already knows which one it wants (from the
environment variable in the developer command prompt).  One of them
(from 15.7.2, if that's interesting) causes a COMException on the
ISetupInstance2.GetPackages call.  Ignoring such packages seems
harmless and unblocks the rest of the run.

PR-URL: #2018
Reviewed-By: João Reis <reis@janeasystems.com>

PR-URL: #2012