Adding Mac OS Support

[fearganni]

I don't personally use MacOS, but it would be good for people who are making cross platform applications to have this feature, or something relatively close to the acrylic style.

[xanderfrangos]

Actually, this module appears to be modeled after the existing "vibrancy" support in Electron: https://www.electronjs.org/docs/api/browser-window#winsetvibrancytype-macos

So MacOS support isn't needed.

[seo-rii]

That's right, macOS supports the vibrancy option on the Electron itself. If this module is used in the same way as Windows in macOS, it is already processed to call the Electron built-in function without building the C module.

[fearganni]

you're right my mistake, i had a wee bit of a brain fart there