feat: add support for YouTube Kids (#291)

* dev: add `WEB_KIDS` innertube client

* refactor: move DASH manifest stuff out of `VideoInfo`
This makes it easier to use these functions elsewhere.

* feat(ytkids): add `Kids#getInfo()` & `Kids#search()`

* feat: add `Innertube#kids.getHomeFeed()`

* docs: add YouTube Kids API ref

* docs: fix typo

* docs: fix yet another typo

* docs: update YouTube Music API ref
Unrelated but required to reflect changes made to the DASH manifest generation functions

* chore: lint

* chore: add tests

* feat: include `captions` in `VideoInfo`

* chore: fix tests

src/parser/classes/SlimOwner.ts

@@ -0,0 +1,25 @@
+import Parser from '..';
+import Text from './misc/Text';
+import Thumbnail from './misc/Thumbnail';
+import NavigationEndpoint from './NavigationEndpoint';
+import SubscribeButton from './SubscribeButton';
+import { YTNode } from '../helpers';
+
+class SlimOwner extends YTNode {
+  static type = 'SlimOwner';
+
+  thumbnail: Thumbnail[];
+  title: Text;
+  endpoint: NavigationEndpoint;
+  subscribe_button: SubscribeButton | null;
+
+  constructor(data: any) {
+    super();
+    this.thumbnail = Thumbnail.fromResponse(data.thumbnail);
+    this.title = new Text(data.title);
+    this.endpoint = new NavigationEndpoint(data.navigationEndpoint);
+    this.subscribe_button = Parser.parseItem<SubscribeButton>(data.subscribeButton, SubscribeButton);
+  }
+}
+
+export default SlimOwner;