refactor!: finish parser migration

Finally! :)

This removes all code related to the old parser.

#65

lib/parser/classes/ExpandableTab.js

@@ -0,0 +1,17 @@
+'use strict';
+
+const Parser = require('..');
+const NavigationEndpoint = require('./NavigationEndpoint');
+
+class ExpandableTab {
+  type = 'ExpandableTab';
+
+  constructor(data) {
+    this.title = data.title;
+    this.endpoint = new NavigationEndpoint(data.endpoint);
+    this.selected = data.selected; // If this.selected then we may have content else we do not
+    this.content = data.content ? Parser.parse(data.content) : null;
+  }
+}
+
+module.exports = ExpandableTab;