don't drop events if we receive more than 8 in one batch

src/ConferenceCallManager.js

@@ -51,7 +51,11 @@ export class ConferenceCallManager extends EventEmitter {
 
         const manager = new ConferenceCallManager(client);
 
-        await client.startClient();
+        await client.startClient({
+          // dirty hack to reduce chance of gappy syncs
+          // should be fixed by spotting gaps and backpaginating
+          initialSyncLimit: 50,
+        });
 
         await waitForSync(client);