title: origOptions error with string containing EXDATE of jakubroztocil/rrule
body: <p>Currently I am using the library <a href="https://github.com/jakubroztocil/rrule" rel="nofollow noreferrer">jakubroztocil/rrule</a></p>
  <p>When I convert a string containing <code>EXDATE</code> to <code>rrule</code> the origOptions attribute I get is always an empty object. But if I leave it out, it returns true.</p>
  <p>Ex:</p>
  <pre><code>DTSTART;TZID=Asia/Saigon:20220808T080000\nRRULE:FREQ=WEEKLY;INTERVAL=1;BYDAY=MO;UNTIL=20220907T170000Z
  </code></pre>
  <p>With this string I get the correct result</p>
  <p><a href="https://i.stack.imgur.com/WJmHy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WJmHy.png" alt="Correct Result Image" /></a></p>
  <pre><code>DTSTART;TZID=Asia/Saigon:20220808T080000\nRRULE:FREQ=WEEKLY;INTERVAL=1;BYDAY=MO;UNTIL=20220907T170000Z\nEXDATE;TZID=Asia/Saigon:20220808T080000
  </code></pre>
  <p>With this string I get the wrong result</p>
  <p><a href="https://i.stack.imgur.com/O4Vmh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/O4Vmh.png" alt="Wrong Result Image" /></a></p>
  <p>Looks like my problem will be something similar to <a href="https://github.com/jakubroztocil/rrule/issues/333" rel="nofollow noreferrer">#333</a></p>
  <p>But I get nothing from it.</p>
  <p>Thank u very much</p>