title: Detect timezone abbreviation using luxon
body: <p>Moment timezone results with short timezone abbreviations, e.g</p>
  
  <pre><code>moment.tz([2012, 0], 'America/New_York').format('z');    // EST
  moment.tz([2012, 5], 'America/New_York').format('z');    // EDT
  </code></pre>
  
  <p>Is there a similar way we can achieve that using luxon</p>
  
  <p>I tried <code>offsetNameShort</code>, but, it results to <code>GMT+5:30</code> for a date like <code>"2020-05-23T13:30:00+05:30"</code></p>
  
  <p>Something like <code>DateTime.fromISO(""2020-05-23T13:30:00+05:30"").toFormat('z')</code> doesn't work either</p>
  
  <p>Is there a way we can remove the <code>+5:30</code> timezone from the format?</p>