Event dispatch requires second parameter

[BenRutlandWeb]

Describe the bug The event dispatch method requires a second parameter to be passed.

To Reproduce Steps to reproduce the behavior:

1. Attempt to dispatch an event without a second parameter
2. See error

Expected behavior The event to dispatch regardless of the presence of the second variable

Screenshots

Event::dispatch('wp_loaded');

Additional context Unlike do_action, apply_filters requires this to be set. Setting the second value to null is a workaround.