Add failing test
Add duration > 0 check
Merge branch 'feature/negative-duration-check' into dev
1.1.1
Wake up dyno before running test suite
Update some modules
Update packages
1.1.2
Migration attempt for time entries check

See #27

I would think this would work. The underlying check ends up looking like
this.

```
"start_and_end_or_duration" CHECK (start <> NULL::timestamp with time zone AND "end" <> NULL::timestamp with time zone OR duration <> NULL::real)
```