Fix not being able to refresh Mentions tab on Pleroma

Closes #411

Packages/InstanceFeatures/Sources/InstanceFeatures/InstanceFeatures.swift

@@ -134,6 +134,16 @@ public class InstanceFeatures: ObservableObject {
         }
     }
     
+    public var statusEditNotifications: Bool {
+        // pleroma doesn't seem to support 'update' type notifications, even though it supports edits
+        hasMastodonVersion(3, 5, 0)
+    }
+    
+    public var statusNotifications: Bool {
+        // pleroma doesn't support notifications for new posts from an account
+        hasMastodonVersion(3, 3, 0)
+    }
+    
     public var needsEditAttachmentsInSeparateRequest: Bool {
         instanceType.isPleroma(.akkoma(nil))
     }

Tusker/Screens/Notifications/NotificationsCollectionViewController.swift

@@ -398,6 +398,12 @@ extension NotificationsCollectionViewController {
             var types = Set(Notification.Kind.allCases)
             types.remove(.unknown)
             allowedTypes.forEach { types.remove($0) }
+            if !mastodonController.instanceFeatures.statusEditNotifications {
+                types.remove(.update)
+            }
+            if !mastodonController.instanceFeatures.statusNotifications {
+                types.remove(.status)
+            }
             return Client.getNotifications(excludedTypes: Array(types), range: range)
         }
     }