Failed to parse config

As soon as I created the below config file I'm getting this when running:

```'plaintext
config:2] Failed to parse option 'background-color=#171717
Failed to parse config
```

If I remove all entries, even leaving one of them I get this error.

```plaintext
font=CommitMono Nerd Font Mono 15
background-color=#171717
text-color=#dedacf
border-size=1px
border-color=#101010
default-timeout=10000
```

EDIT: To test, I simply copied the exact config from https://github.com/emersion/mako/wiki/Example-configuration and ran that with `--config` and got the same error.

Bug?