Update info xml

Signed-off-by: GretaD <gretadoci@gmail.com>

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         php-versions: [7.3, 7.4]
-        nextcloud-versions: ['stable20', 'master']
+        nextcloud-versions: ['stable20', 'stable21', 'master']
     name: Nextcloud ${{ matrix.nextcloud-versions }} php${{ matrix.php-versions }} unit tests
     steps:
     - name: Set up php${{ matrix.php-versions }}

appinfo/info.xml

@@ -34,7 +34,7 @@
 	<screenshot>https://user-images.githubusercontent.com/1374172/79554966-278e1600-809f-11ea-82ea-7a0d72a2704f.png</screenshot>
 	<dependencies>
 		<php min-version="7.3" max-version="7.4" />
-		<nextcloud min-version="20" max-version="21" />
+		<nextcloud min-version="21" max-version="22" />
 	</dependencies>
 	<repair-steps>
 		<post-migration>