Stuck on Spawning mono...

I'm stuck on spawning mono for an hour... Any idea why?

electron: v9.1.1
electron-winstaller: v4.0.1
mono: v6.12.0.90
wine: v5.0

Debug logs:

```
electron-windows-installer:main Using Mono: 'mono' +0ms
electron-windows-installer:main Using Wine: 'wine64' +0ms
electron-windows-installer:main Created NuSpec file:
electron-windows-installer:main 
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main masklab_fulfillment
electron-windows-installer:main masklab fulfillment
electron-windows-installer:main 0.2.0
electron-windows-installer:main Albert Chen
electron-windows-installer:main Albert Chen
electron-windows-installer:main https://raw.githubusercontent.com/electron/electron/master/shell/browser/resources/win/electron.ico
electron-windows-installer:main false
electron-windows-installer:main masklab fulfillment app
electron-windows-installer:main Copyright © 2020 Albert Chen
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main
electron-windows-installer:main +11ms
electron-windows-installer:spawn Spawning mono /Users/albertchen/github/masklab-fulfillment/node_modules/electron-winstaller/vendor/nuget.exe pack /var/folders/qr/pqtkrqzd7klc5872rw7hk_lw0000gn/T/si-2020928-5358-199xlk0.3ac8/masklab_fulfillment.nuspec -BasePath /Users/albertchen/github/masklab-fulfillment/out/masklab fulfillment-win32-x64 -OutputDirectory /var/folders/qr/pqtkrqzd7klc5872rw7hk_lw0000gn/T/si-2020928-5358-199xlk0.3ac8 -NoDefaultExcludes +0ms
```