Fix Ctrl-C handling in Windows NPM shim (#483)

[stkb]

Should fix #483

[f-f]

Thank you! 🎉

[stkb]

@kohanyirobert, could you try on your machine, replacing the contents of the spago file (no extension) in your global node_modules/spago folder, with this new version? It should make Ctrl-C work correctly in spago repl.

There is unfortunately still a slight issue. If you use Ctrl-C in the repl, then after you quit it (either with :quit or Ctrl-D) you get 2x this annoying prompt:

Terminate batch job (Y/N)?

This isn't caused by this change, but appears now because we're now exiting the process properly. (It's caused by the npm shims: if you use purs repl ... with a npm purescript installation, you get that prompt when quitting the repl too; but when you use spago repl you get it twice because you also have a spago npm shim). That prompt is annoying and difficult to get rid of. Also, for some reason it only appears if you've used Ctrl-C while in the repl.

[f-f]

@stkb I'm about to cut a release so let's merge this anyways, and we can followup with other PRs if we find issues with this fix

[stkb]

@f-f ok!