ES6 to ES5 in console-logs.js test file

Author: kamilogorek

packages/browser/test/integration/console-logs.js

@@ -1,7 +1,7 @@
 console.log('One');
 console.warn('Two', { a: 1 });
 console.error('Error 2');
-let a = () => {
+function a() {
   throw new Error('Error thrown 3');
-};
+}
 a();