Fix AccumulatedIndexer to work with updated meilisearch

In 7db8492 we bumped up meilisearch from `v0.16.0`
to `v1.6.1`. To take into account the changed APIs,
we made appropriate changes to the `create_index`
function: 7db8492#diff-f19db9be4450da07fbdc4f72ff25a2f7163caad1380a3d5b6176afd458f81c3f

But we missed changing `AccumulatedIndexer`. As a
consequence, showing "waiting for index to be ready..."
was broken. In this change, we fix that.

pyapp/BetterDict.py

@@ -127,13 +127,13 @@ def add(self, items):
         self.items.extend(items)
 
     def finish(self):
-        updateId = self.index.add_documents(self.items)["updateId"]
+        task_info = self.index.add_documents(self.items)
 
         def status():
-            return self.index.get_update_status(updateId)["status"]
+            return self.index.get_task(task_info.task_uid).status
 
         ipb = IndefiniteProgressBar(title="Waiting for index to be ready...")
-        while (s := status()) != "processed":
+        while (s := status()) != "succeeded":
             ipb.update(message="")
             time.sleep(2)
         ipb.finish()