user/kde-education: add Cantor to KDE Edu metapkg

user/kde-education/APKBUILD

@@ -2,14 +2,14 @@
 # Maintainer: A. Wilcox <awilfox@adelielinux.org>
 pkgname=kde-education
 pkgver=18.08.2
-pkgrel=0
+pkgrel=1
 pkgdesc="Educational software from the KDE Software Collection"
 url="https://www.kde.org/applications/education/"
 arch="noarch"
 options="!check"  # Empty meta package, no point in testing.
 license="NCSA"
 # gcompris-qt is removed until it works with gettext-tiny.
-depends="artikulate blinken kalgebra kalzium kanagram kbruch
+depends="artikulate blinken cantor kalgebra kalzium kanagram kbruch
 	kgeography khangman kig kiten klettres kmplot ktouch kturtle kwordquiz
 	labplot marble minuet rocs step"
 makedepends=""