Update dependencies: @types/node to 11.12.0, eslint to 5.15.3, js-yaml to 3.13.0, typescript to 3.3.4000, uglify-js to 3.5.2.

demo/default.js

@@ -89,7 +89,7 @@
     } else {
       // Update from File object
       var reader = new FileReader();
-      reader.onload = function readerOnload(e) {
+      reader.onload = function onload(e) {
         markdown.value = e.target.result;
         onMarkdownInput();
       };