1b0440a33f
This commit fixes a situation where an index cannot be updated through this client as the index is aliased, with the client pointing to the alias. As the `GET /<index>/_settings` request will only ever return the settings for the specified index (through the alias), it would only have one key, so the name of the key would not matter. We can pop the key to get the settings object for the index through the alias. Signed-off-by: Étienne Beaulé <beauleetienne0@gmail.com>