Make pipetx work on windows

[matheusd]

WIP:
https://github.com/matheusd/decrediton/tree/pipetx-win

The basic requirement is that the module needs to use libuv's uv_open_osfhandle. However that has only been added to libuv 1.23.0, which has only been imported in node 10.10.

However, electron 3.x uses node 10.2 (and a custom version at that) so it's not easily upgradable.

We need to wait for electron 4 to to be released, which will use node 10.11, to then come back, update and recheck this work.