refactor: migrate parsers to TS (#133)

* dev: finish top-level parsers TS migration

* dev: migrate menu renderers to TS

* chore: fix ts errors

* dev: finish ts migration 🎉

src/parser/classes/UniversalWatchCard.ts

@@ -0,0 +1,20 @@
+import Parser from '../index';
+import { YTNode } from '../helpers';
+
+class UniversalWatchCard extends YTNode {
+  static type = 'UniversalWatchCard';
+
+  header;
+  call_to_action;
+  sections;
+
+  constructor(data: any) {
+    super();
+    // TODO: use parseItem / parseArray for these
+    this.header = Parser.parse(data.header);
+    this.call_to_action = Parser.parse(data.callToAction);
+    this.sections = Parser.parse(data.sections);
+  }
+}
+
+export default UniversalWatchCard;