Fix browser random in WebWorkers (#2405).

packages/random/src.ts/browser-random.ts

@@ -9,18 +9,15 @@ const logger = new Logger(version);
 // Debugging line for testing browser lib in node
 //const window = { crypto: { getRandomValues: () => { } } };
 
-let anyGlobal: any = null;
-try {
-    anyGlobal = (window as any);
-    if (anyGlobal == null) { throw new Error("try next"); }
-} catch (error) {
-    try {
-        anyGlobal = (global as any);
-        if (anyGlobal == null) { throw new Error("try next"); }
-    } catch (error) {
-        anyGlobal = { };
-    }
-}
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/globalThis
+function getGlobal(): any {
+  if (typeof self !== 'undefined') { return self; }
+  if (typeof window !== 'undefined') { return window; }
+  if (typeof global !== 'undefined') { return global; }
+  throw new Error('unable to locate global object');
+};
+
+const anyGlobal = getGlobal();
 
 let crypto: any = anyGlobal.crypto || anyGlobal.msCrypto;
 if (!crypto || !crypto.getRandomValues) {