fix(uuid): update uuid.ts based on JS implementation

packages/analytics-core/src/utils/uuid.ts

@@ -1,32 +1,19 @@
 /**
- * Source: [jed's gist]{@link https://gist.github.com/982883}.
+ * Source: [jed's gist's comment]{@link https://gist.github.com/jed/982883?permalink_comment_id=3223002#gistcomment-3223002}.
  * Returns a random v4 UUID of the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx,
  * where each x is replaced with a random hexadecimal digit from 0 to f, and
  * y is replaced with a random hexadecimal digit from 8 to b.
  * Used to generate UUIDs for deviceIds.
  * @private
  */
-export const UUID = function (a?: any): string {
-  return a // if the placeholder was passed, return
-    ? // a random number from 0 to 15
-      (
-        a ^ // unless b is 8,
-        ((Math.random() * // in which case
-          16) >> // a random number from
-          (a / 4))
-      ) // 8 to 11
-        .toString(16) // in hexadecimal
-    : // or otherwise a concatenated string:
-      (
-        String(1e7) + // 10000000 +
-        String(-1e3) + // -1000 +
-        String(-4e3) + // -4000 +
-        String(-8e3) + // -80000000 +
-        String(-1e11)
-      ) // -100000000000,
-        .replace(
-          // replacing
-          /[018]/g, // zeroes, ones, and eights with
-          UUID, // random hex digits
-        );
+
+const hex: string[] = [...Array(256).keys()].map((index) => index.toString(16).padStart(2, '0'));
+
+export const UUID = (): string => {
+  const r = crypto.getRandomValues(new Uint8Array(16));
+
+  r[6] = (r[6] & 0x0f) | 0x40;
+  r[8] = (r[8] & 0x3f) | 0x80;
+
+  return [...r.entries()].map(([index, int]) => ([4, 6, 8, 10].includes(index) ? `-${hex[int]}` : hex[int])).join('');
 };