Expose events (EventEmitter) to sandboxed renderer (#12828)

lib/sandboxed_renderer/init.js

@@ -25,6 +25,7 @@ const fs = require('fs')
 const preloadModules = new Map([
   ['child_process', require('child_process')],
   ['electron', electron],
+  ['events', events],
   ['fs', fs],
   ['os', require('os')],
   ['path', require('path')],