v5.0.0

This release affects only type definitions for TypeScript but doesn't change any implementation.

Breaking changes

• 77fb6209...a3774a59 changed type definition. In new definition, we can specify arbitary Event type for each event with type parameters. It generate specialized types for addEventListener, removeEventListener, dispatchEvent, and event attributes such as onclick. See also https://github.com/mysticatea/event-target-shim#typescript