changed behavior for non-xml mode
changed behavior for non-xml mode

• lowercase tag and attribute names by default
• CDATA is now emitted as a comment (fixes tmpvar/jsdom#618)

magicode/htmlparser2,jasonsanjose/htmlparser2,mail-apps/htmlparser2,magicode/htmlparser2,mail-apps/htmlparser2,broadly/htmlparser2,frontapp/htmlparser2,frontapp/htmlparser2,jasonsanjose/htmlparser2,broadly/htmlparser2,kirbysayshi/node-htmlparser,fasterize/node-htmlparser