Dependency jsuck is outdated

Hi, 

please note that installation is causing warnings on node 12. 

```
npm WARN notsup Unsupported engine for jsuck@0.0.4: wanted: {"node":"~0.9.12 || ~0.10.0"} (current: {"node":"12.14.1","npm":"6.13.4"})
```

See also https://github.com/deoxxa/jsuck/issues/2

