rpm: require new enough qubesadmin for vm_dependencies function

rpm_spec/qmgr.spec.in

@@ -10,7 +10,7 @@ URL:		http://fixme
 Requires:	python3
 Requires:	python3-PyQt4
 Requires:	python3-inotify
-Requires:	python3-qubesadmin >= 4.0.13
+Requires:	python3-qubesadmin >= 4.0.19
 Requires:	qubes-artwork
 Requires:	pmount
 Requires:	cryptsetup