NEW: Add two utilities `escapeSpecialChars` and `escapeAndEncode`.
NEW: Add two utilities `escapeSpecialChars` and `escapeAndEncode`.

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