message: fix: Fix duplicate navigation entries (getsentry/sentry-replay#168)
  Not sure what is causing the dupes, but they are the same object, and the observer was only called once when I was debugging it. Going to just de-dupe this for now.
  Closes getsentry/sentry-replay#153
diff: @@ -589,12 +589,14 @@ export class SentryReplay implements Integration {
  /**
  * Keep a list of performance entries that will be sent with a replay
  */
  - handlePerformanceObserver = (
  - list: PerformanceObserverEntryList
  - // observer: PerformanceObserver
  - ) => {
  - const newEntries = list.getEntries();
  - this.performanceEvents = [...this.performanceEvents, ...newEntries];
  + handlePerformanceObserver = (list: PerformanceObserverEntryList) => {
  + // For whatever reason the observer was returning duplicate navigation
  + // entries (the other entry types were not duplicated).
  + const newEntries = new Set(list.getEntries());
  + this.performanceEvents = [
  + ...this.performanceEvents,
  + ...Array.from(newEntries),
  + ];
  };
  /**
  