Fails to detect sixel support under kitty

[gwolf]

I tried to use lsix in kitty 0.35.1, which has sixel support, but lsix reports:

Error: Your terminal does not report having sixel graphics support.

Please use a sixel capable terminal, such as xterm -ti vt340, or
ask your terminal manufacturer to add sixel support.

You may test your terminal by viewing a single image, like so:

  convert  foo.jpg  -geometry 800x480  sixel:-

If your terminal actually does support sixel, please file a bug
report at http://github.com/hackerb9/lsix/issues

Please mention device attribute codes: ^[[?62;c