message: fix(custom-events): onloadend type defined
  Related Ticket(s)
  Description
  I've added a type definition for loadend on the global ElementEventMap, so we fix the error that was blocking Angular 10 development.
diff: @@ -19,6 +19,12 @@ declare module '*.mdx' {
  };
  }
  +declare global {
  + interface ElementEventMap {
  + loadend: Event;
  + }
  +}
  +
  declare module '*.scss';
  declare module '*.svg';
  declare module '*.jpg';
  