Optimize internal getStats() call

[RyanZim]

This function makes two async stat calls, one after the other:

node-fs-extra/lib/util/stat.js

Lines 29 to 53 in 9bfd380

	function getStats (src, dest, cb) {
	if (nodeSupportsBigInt()) {
	fs.stat(src, { bigint: true }, (err, srcStat) => {
	if (err) return cb(err)
	fs.stat(dest, { bigint: true }, (err, destStat) => {
	if (err) {
	if (err.code === 'ENOENT') return cb(null, { srcStat, destStat: null })
	return cb(err)
	}
	return cb(null, { srcStat, destStat })
	})
	})
	} else {
	fs.stat(src, (err, srcStat) => {
	if (err) return cb(err)
	fs.stat(dest, (err, destStat) => {
	if (err) {
	if (err.code === 'ENOENT') return cb(null, { srcStat, destStat: null })
	return cb(err)
	}
	return cb(null, { srcStat, destStat })
	})
	})
	}
	}

We could optimize this by making both calls at the same time, then awaiting both.

[manidlou]

agreed!