package/stellarium: bump version to 0.21.0

Release notes:
http://stellarium.org/release/2021/03/28/stellarium-0.21.0.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/stellarium/stellarium.hash

@@ -1,5 +1,5 @@
 # From https://github.com/Stellarium/stellarium/releases
-sha1  c399f9c785f6a33d04f1a1c4f2db3309ce4781dc  stellarium-0.20.4.tar.gz
-sha256  63033bb6ad01b5f021689766b2a09a99bcabcfec57a710e46a93c40a32fda388  stellarium-0.20.4.tar.gz
+sha1  0ada184a15729abb1b02490cb92d055ff3b61d7e   stellarium-0.21.0.tar.gz
+sha256  977fcd6776a47d34b1646727853d15968a1410c34c8ba1b3e5cfbf24b5126f13  stellarium-0.21.0.tar.gz
 # Locally computed
 sha256  3aeeb5bb98bf7041ab82cffe15efa28ac58ee2bdf162b71301f5c192be631259  COPYING

package/stellarium/stellarium.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-STELLARIUM_VERSION = 0.20.4
+STELLARIUM_VERSION = 0.21.0
 STELLARIUM_SITE = https://github.com/Stellarium/stellarium/releases/download/v$(STELLARIUM_VERSION)
 STELLARIUM_LICENSE = GPL-2.0+
 STELLARIUM_LICENSE_FILES = COPYING