message: refactor(elements): ensure compatibility with noImplicitOverride
  Adds the `override` keyword to the `elements` sources to ensure
  compatibility with `noImplicitOverride`.
  PR Close
diff: @@ -125,9 +125,9 @@ if (browserDetection.supportsCustomElements) {
  it('should not break if `NgElementStrategy#events` is not available before calling `NgElementStrategy#connect()`',
  () => {
  class TestStrategyWithLateEvents extends TestStrategy {
  - events: Subject<NgElementStrategyEvent> = undefined!;
  + override events: Subject<NgElementStrategyEvent> = undefined!;
  - connect(element: HTMLElement): void {
  + override connect(element: HTMLElement): void {
  this.connectedElement = element;
  this.events = new Subject<NgElementStrategyEvent>();
  this.events.next({name: 'strategy-event', value: 'connect'});
  