Windows: 32-bit NodeJS - No binary found matching your system.

[zaggino]

Windows 10 64-bit, NodeJS 6.3.1 32-bit

$ node --version && npm --version && npm install flow-bin
v6.3.1
3.10.5

> flow-bin@0.30.0 postinstall D:\dev\test\node_modules\flow-bin
> node lib/install.js

  × No binary found matching your system. It's probably not supported.
  × flow binary test failed

If there's no 32-bit build of Flow for Windows, can it at least try to download and execute the 64-bit one?

[amilajack]

@gabelevi @jeffmo @zaggino Appveyor support can be added by testing only against x64 windows platforms.

https://github.com/amilajack/eslint-plugin-flowtype-errors/blob/master/appveyor.yml#L18

I'll make a PR for this