Transpile a [MoonScript](https://github.com/leafo/moonscript) file.
npm install mooncTranspile a MoonScript file.
``js
const moonc = require('moonc')
// moonc() returns a ReadableStream that emits transpiled code.
moonc('x = 1')
.pipe(fs.createWriteStream('foo.lua'))
.once('error', console.error)
// moonc.promise() resolves with the transpiled code.
let lua = await moonc.promise('x = 1')
// Both functions work with ReadableStream objects, too!``
moonc(fs.createReadStream('foo.moon'))