chore: replace base64-arraybuffer by @socket.io/base64-arraybuffer

The "base64-arraybuffer" package has been temporarily forked to [1],
until changes are merged upstream.

[1]: https://github.com/socketio/base64-arraybuffer

Related:

- niklasvh/base64-arraybuffer#32
- socketio/socket.io-client#1520
- socketio/socket.io-website#313
- socketio/socket.io#4209

Author: darrachequesne

lib/decodePacket.browser.ts

@@ -1,5 +1,5 @@
 import { ERROR_PACKET, PACKET_TYPES_REVERSE } from "./commons.js";
-import { decode } from "base64-arraybuffer";
+import { decode } from "@socket.io/base64-arraybuffer";
 
 const withNativeArrayBuffer = typeof ArrayBuffer === "function";