fix(utils): fix warning thrown by Webpack (#2843)

Fixes a warning thrown by Webpack for using "require" without importing
anything. Warning reads "require function is used in a way in which
dependencies cannot be statically extracted"

Closes issue #2840

lib/core/utils/uuid.js

@@ -24,7 +24,7 @@ if (!_rng && _crypto && _crypto.getRandomValues) {
 }
 
 try {
-  if (!_rng && require) {
+  if (!_rng) {
     const nodeCrypto = require('crypto');
     _rng = () => nodeCrypto.randomBytes(16);
   }