Use psutil instead of invoking 'ps'

[edisongustavo]

The psutil.Process (docs) can collect the same information as the ps command.

However, it works on windows too, so Syrupy could be used in that platform too.

What do you think? I will make a pull-request changing the code to use psutil.Process if you think that's nice to have.

[RichardBronosky]

I came here to make this same suggestion. I've been using psutil because a coworker asked me to add a Windows box to the stable and none of my regular DevOps skills did me any good. (Except for my Python development chops.)

[jeetsukumaran]

Sorry for the delay in this. Slipped through the gaps, and just noticed it b/c of @RichardBronosky . Yes, this would be a nice feature, and if you have the code ready, will be happy to accept a PR.