cantor ver. bump

/usr/bin/ld: /usr/lib/libpython3.8.so: undefined reference to `pthread_create'
/usr/bin/ld: /usr/lib/libpython3.8.so: undefined reference to `pthread_key_create'
/usr/bin/ld: /usr/lib/libpython3.8.so: undefined reference to `sem_wait'
/usr/bin/ld: /usr/lib/libpython3.8.so: undefined reference to `sem_init'

desktop/kde/applications/cantor/actions.py

@@ -7,12 +7,14 @@
 
 from pisi.actionsapi import pisitools
 from pisi.actionsapi import kde5
+from pisi.actionsapi import get
 
 NoStrip=["/usr/share/icons"]
 # TODO: KAlgebra icon not shown in GUI
 # TODO: more sub packages? *-libs etc.?
 
 def setup():
+    pisitools.cxxflags.add("-std=c++11 -pthread")
     kde5.configure()
 
 def build():