FIX: Update README to reflech recent changes made on the library.
FIX: Update README to reflech recent changes made on the library.

godong9/solr-node-client,nicolasembleton/solr-node-client,yanxi-com/solr-node-client,Bangsheng/solr-node-client,kfitzgerald/solr-node-client,lbdremy/solr-node-client,lbdremy/solr-node-client,CondeNast/solr-node-client,luketaverne/solr-node-client