The argument to `httpx.Limits` is named `max_keepalive_connections` but is referenced as `max_keepalive` in the docs.
You can control the connection pool size using the `limits` keyword
argument on the client. It takes instances of `httpx.Limits` which define:
-- `max_keepalive`, number of allowable keep-alive connections, or `None` to always
+- `max_keepalive_connections`, number of allowable keep-alive connections, or `None` to always
allow. (Defaults 20)
- `max_connections`, maximum number of allowable connections, or `None` for no limits.
(Default 100)