Feature
* **client:** Add support for subscribing to $all-stream ([`4d48d08`](https://github.com/betaboon/EventStoreDB-Client-Python/commit/4d48d08349aab5fdc01ea46f54326cf18689fddd))
* **client:** Add support for reading from $all-stream ([`992c03d`](https://github.com/betaboon/EventStoreDB-Client-Python/commit/992c03df98ca05b9a76fd3b5ef10ec82c089975f))