Remove support for winpty

[anthonykim1]

Resolves: #842

[anthonykim1]

Result of npm install:

Compile:

Is there anything else I should check before merging? @Tyriar

[anthonykim1]

Time measured with Measure-Command { npx node-gyp rebuild }
Before start of each build, I have deleted the build folder via: Remove-Item -Recurse -Force .\build

Before removing winpty 59.361 second):

After removing winpty (15.247 seconds):

[Tyriar]

For me 47s before, 14s after 😍