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Merge pull request TheAlgorithms#496 from Mozartuss/master

Add generateUUID.js

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	`1`	`+/*`
	`2`	`+Generates a UUID/GUID in Node.Js.`
	`3`	+The script uses `Math.random` in combination with the timestamp for better randomness.
	`4`	`+The function generate an RFC4122 (https://www.ietf.org/rfc/rfc4122.txt) version 4 UUID/GUID`
	`5`	`+*/`
	`6`	`+`
	`7`	`+const Guid = () => {`
	`8`	`+ const pattern = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'`
	`9`	`+ let currentDateMilliseconds = new Date().getTime()`
	`10`	`+ return pattern.replace(/[xy]/g, currentChar => {`
	`11`	`+ const randomChar = (currentDateMilliseconds + Math.random() * 16) % 16 \| 0`
	`12`	`+ currentDateMilliseconds = Math.floor(currentDateMilliseconds / 16)`
	`13`	`+ return (currentChar === 'x' ? randomChar : (randomChar & 0x7 \| 0x8)).toString(16)`
	`14`	`+ })`
	`15`	`+}`
	`16`	`+`
	`17`	`+console.log(Guid()) // 'edc848db-3478-1760-8b55-7986003d895f'`

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