envsync backup fails with "unknown flag: --config"

Trying to back up my developer account, I run:

envsync backup

and nothing succeeds. Everything fails with:

```
❯ envsync backup
Using configuration from /Users/sasewh/.okta/okta.yaml
Backing up first pass resources...
Backing up user using lists command...
**Error: unknown flag: --config**
Usage:
  okta-cli-client user lists [flags]

Flags:
  -h, --help   help for lists
```
