Added missing type hint in FunctionScoreQuery.
Added missing type hint in FunctionScoreQuery.

Closes #74.

murnieza/ElasticsearchBundle,asev/ElasticsearchBundle,tautrimas/ElasticsearchBundle,asev/ElasticsearchBundle,abhiesa-tolexo/ElasticsearchBundle,lmikelionis/ElasticsearchBundle,ndinh215/ONGRElasticsearchBundle,GrandLTU/ElasticsearchBundle,trandangtri/ElasticsearchBundle,abhiesa-tolexo/ElasticsearchBundle,GrandLTU/ElasticsearchBundle,murnieza/ElasticsearchBundle,ongr-io/ElasticsearchBundle,martiis/ElasticsearchBundle,martiis/ElasticsearchBundle,saimaz/ElasticsearchBundle,tautrimas/ElasticsearchBundle,trandangtri/ElasticsearchBundle,ndinh215/ONGRElasticsearchBundle,saimaz/ElasticsearchBundle