Add appveyor support

[amilajack]

No description provided.

[aredridel]

Where are these coming from / used? Is there a nodejs binary release marked ia32?

[JLHwung]

This change is necessary for 32bit Windows to install the npm package node, otherwise npm will throw

error C:\Users\IEUser\babel\packages\babel-preset-env\node_modules\node: Command failed.
Exit code: 1
Command: node installArchSpecificPackage
Arguments: 
Directory: C:\Users\IEUser\babel\packages\babel-preset-env\node_modules\node
Output:
npm ERR! code EBADPLATFORM
npm ERR! notsup Unsupported platform for node-win-x86@12.13.1: wanted {"os":"win32","arch":"x86"} (current: {"os":"win3
2","arch":"ia32"})
npm ERR! notsup Valid OS:    win32
npm ERR! notsup Valid Arch:  x86
npm ERR! notsup Actual OS:   win32
npm ERR! notsup Actual Arch: ia32
npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\IEUser\AppData\Roaming\npm-cache\_logs\2019-12-17T01_34_23_329Z-debug.log
internal/modules/cjs/loader.js:628
    throw err;
    ^
Error: Cannot find module 'node-win-x86/package.json'

As long as ia32 is mapped to install node-win-x86 instead, we should state this at its package.json that cpus: ["x86", "ia32"] is supported.

[amilajack]

These were taken from #45 (comment)