Bug#917577: jameica: depends on libswt-gtk2 which is no longer built

[Jeremy Bicha]

Source: jameica
Version: 2.8.2+dfsg-5
Severity: serious

jameica depends on libswt-gtk4-jni but that package is no longer built
by swt4-gtk.

Please switch to using libswt-gtk-4-jni instead (which uses gtk3
instead of gtk2).

Thanks,
Jeremy Bicha