Add a capability

Signed-off-by: Joas Schilling <coding@schilljs.com>

docs/api-v1.md

@@ -80,6 +80,7 @@ Base endpoint is: `/ocs/v2.php/apps/spreed/api/v1`
 
 ### 5.0
 * `invite-by-mail` - Guests can be invited with their email address
+* `notification-levels` - Users can select when they want to be notified in conversations
 
 ## Room management
 

lib/Capabilities.php

@@ -46,6 +46,7 @@ class Capabilities implements IPublicCapability {
 					'mention-flag',
 					'in-call-flags',
 					'invite-by-mail',
+					'notification-levels',
 				],
 			],
 		];

tests/php/CapabilitiesTest.php

@@ -50,6 +50,7 @@ class CapabilitiesTest extends TestCase {
 					'mention-flag',
 					'in-call-flags',
 					'invite-by-mail',
+					'notification-levels',
 				],
 			],
 		], $capabilities->getCapabilities());