khal: update to 0.9.0

vdirsyncer isn’t a hard dependency any more.

srcpkgs/khal/template

@@ -1,20 +1,20 @@
 # Template file for 'khal'
 pkgname=khal
-version=0.8.4
-revision=2
+version=0.9.0
+revision=1
 noarch=yes
 build_style=python3-module
 pycompile_module="khal"
 hostmakedepends="python3-setuptools"
 depends="python3-setuptools python3-click python3-configobj
  python3-dateutil python3-icalendar python3-pytz python3-tzlocal
- python3-urwid python3-xdg vdirsyncer"
+ python3-urwid python3-xdg python3-atomicwrites"
 short_desc="Command-line calendar build around CalDAV"
 maintainer="Oliver Kiddle <okiddle@yahoo.co.uk>"
 license="MIT"
 homepage="http://lostpackets.de/khal/"
 distfiles="${PYPI_SITE}/k/khal/khal-${version}.tar.gz"
-checksum=2e5c41eadf83c8f175dc05816571e747da921b025e4acc6b287c109b6e237e0f
+checksum=b9aa992a8ed1a5d816eeeff79256ad7edea591acdf16ae30e65bfdc3adef0f8d
 
 pre_build() {
 	sed -i setup.py \