fix path issues on windows

[Lunarequest]

this should fix #19

[Lunarequest]

@mighdoll would you mind reviewing this?

[mighdoll]

will do

[SimonSimCity]

Could you please check this code again? I've tried to use it, but it didn't fix the problem.

When running the following code in node

const { platform } = require('os');
console.log(platform.name)

I receive text platform on my console.

When digging a bit deeper, I found out, that os.platform is a function (https://nodejs.org/api/os.html#osplatform). Alternatively, process.platform could be used, which is a property (https://nodejs.org/api/process.html#processplatform).