fix(types): use [] attribute access instead of .get for alias

Author: tharropoulos

src/typesense/async_/aliases.py

@@ -70,7 +70,7 @@ def __getitem__(self, name: str) -> AsyncAlias:
         """
         if not self.aliases.get(name):
             self.aliases[name] = AsyncAlias(self.api_call, name)
-        return self.aliases.get(name)
+        return self.aliases[name]
 
     async def upsert(self, name: str, mapping: AliasCreateSchema) -> AliasSchema:
         """