fixing html class events type error when defining existing global events

component/src/types/html.ts

@@ -1,7 +1,7 @@
 import {StatefulStyles} from './styles';
 
 export type EventToFunction = {
-  [K in keyof GlobalEventHandlersEventMap]?: (event: GlobalEventHandlersEventMap[K]) => void;
+  [K in keyof GlobalEventHandlersEventMap]?: (event: Partial<GlobalEventHandlersEventMap[K]>) => void;
 } & {[eventName: string]: (event: CustomEvent) => void};
 
 export interface HTMLClassUtility {