fix(utils): replace getRandomValues with crypto module (#6788)

lib/utils.js

@@ -1,6 +1,7 @@
 'use strict';
 
 import bind from './helpers/bind.js';
+import crypto from 'crypto';
 
 // utils is a library of generic helper functions non-specific to axios
 
@@ -615,8 +616,10 @@ const ALPHABET = {
 const generateString = (size = 16, alphabet = ALPHABET.ALPHA_DIGIT) => {
   let str = '';
   const {length} = alphabet;
-  while (size--) {
-    str += alphabet[Math.random() * length|0]
+  const randomValues = new Uint32Array(size);
+  crypto.randomFillSync(randomValues);
+  for (let i = 0; i < size; i++) {
+    str += alphabet[randomValues[i] % length];
   }
 
   return str;