fix(calculateNodeHeight): prevent return 0 for empty textareas
fix(calculateNodeHeight): prevent return 0 for empty textareas

nickpresta/react-textarea-autosize,andreypopp/react-textarea-autosize,plyo/react-textarea-autosize,andreypopp/react-textarea-autosize,frankychung/react-textarea-autosize,kakadiya91/react-textarea-autosize,nickpresta/react-textarea-autosize,koistya/react-textarea-autosize,koistya/react-textarea-autosize,frankychung/react-textarea-autosize,plyo/react-textarea-autosize,andreypopp/react-textarea-autosize,kakadiya91/react-textarea-autosize