message: EventIndexing: Move the max events per crawl constant into the class.
diff: @@ -26,6 +26,9 @@ export default class EventIndexer {
  // The time that the crawler will wait between /rooms/{room_id}/messages
  // requests
  this._crawlerTimeout = 3000;
  + // The maximum number of events our crawler should fetch in a single
  + // crawl.
  + this._eventsPerCrawl = 100;
  this._crawlerRef = null;
  this.liveEventsForIndex = new Set();
  }
  @@ -218,7 +221,7 @@ export default class EventIndexer {
  try {
  res = await client._createMessagesRequest(
  - checkpoint.roomId, checkpoint.token, 100,
  + checkpoint.roomId, checkpoint.token, this._eventsPerCrawl,
  checkpoint.direction);
  } catch (e) {
  console.log("EventIndex: Error crawling events:", e);
  