Typehint: Index instead of Indexes

[tacman]

Description

It has always felt unnatural for the index to be called Indexes.

We could deprecate the plural in version 1 and have version 2 return just Index.

OLD:

    public function getIndex(string $indexCode): Indexes
    {
        return $this->client->index($indexCode);
    }

NEW:

    public function getIndex(string $indexCode): Index
    {
        return $this->client->index($indexCode);
    }

[Strift]

Thanks for opening an issue!

I agree with this proposal. WDYT @brunoocasali @norkunas?

Feel free to open a PR to address this. :)

[norkunas]

Sounds reasonable