vulns return invalid character '<'

When querying for vulns, I get this error
```
$ reg vulns  --clair https://clair.j3ss.co r.j3ss.co/chrome
```

I am using this version of reg
```
reg:
 version     : v0.16.1
 git hash    : 4203e559
 go version  : go1.13.4
 go compiler : gc
 platform    : linux/amd64
```