gsutil on macOS Catalina

I'm getting the following warning on each `gsutil` call:

```
WARNING: Executing a script that is loading libcrypto in an unsafe way. This will fail in a future version of macOS. Set the LIBRESSL_REDIRECT_STUB_ABORT=1 in the environment to force this into an error.
```

I'm already running the latest version:

```
gsutil version: 4.46
```

Is it a gsutil issue, or I need to update anything else?