array.prototype.unshift/.nycrc

ES spec-compliant `Array.prototype.unshift` shim/polyfill/replacement that works as far down as ES3.

{
	"all": true,
	"check-coverage": false,
	"reporter": ["text-summary", "text", "html", "json"],
	"exclude": [
		"coverage",
		"test"
	]
}