title: Expo not publishing
body: <p>When I try to publish my Expo apps, it seems to have problems with apps that have un-optimized assets. I try to run <code>expo optimize</code> on these but sometimes I <a href="https://stackoverflow.com/questions/56979112/package-failing-to-be-found-after-successful-install/56979267?noredirect=1#comment100516789_56979267">can't get this to work</a> so I try publishing anyway, from the browser console, and it never finishes. I tried this earlier today and it got through <code>Optimizing assets...</code> in the publish process, and then go stuck on <code>Building Javascript Bundle</code>. Right now I'm trying again and it appears to be stuck on <code>Optimizing /Users/TuzMacbookPro2017/Development/QMG-local/APPS/ELECTRO/assets/electro-icon-1024.png</code>.</p>
  
  <p>Even with this un-optimized asset I can get through <code>expo build:ios</code> without any apparent problems.</p>
  
  <p>Any solutions?</p>