upgrade/replace websocket.js to @gamestdio/websocket v2 (#12543)

* Update stream.js

* Update package.json

* Update yarn.lock

Co-authored-by: hina <hina@hinaloe.net>

app/javascript/mastodon/stream.js

@@ -1,4 +1,4 @@
-import WebSocketClient from 'websocket.js';
+import WebSocketClient from '@gamestdio/websocket';
 
 const randomIntUpTo = max => Math.floor(Math.random() * Math.floor(max));