Pruned node modules

tweaking workflow

node_modules/yargs/lib/yerror.js

@@ -1,11 +0,0 @@
-'use strict'
-function YError (msg) {
-  this.name = 'YError'
-  this.message = msg || 'yargs error'
-  Error.captureStackTrace(this, YError)
-}
-
-YError.prototype = Object.create(Error.prototype)
-YError.prototype.constructor = YError
-
-module.exports = YError