fix: type file uses storage

Author: frankpagan

src/getValue.js

@@ -18,7 +18,7 @@ HTMLHeadingElement.prototype.getValue = function () {
 // TODO: check if using a a switch case will provide better performance
 const getValue = (element) => {
     let value = element.value || element.getAttribute('value') || "";
-    if (element.hasAttribute('component') || element.hasAttribute('plugin')) {
+    if (element.hasAttribute('component') || element.hasAttribute('plugin') || element.type === 'file' || element.getAttribute('type') === 'file') {
         value = storage.get(element)
         storage.delete(element)
         return value