goal completed or expired :: `is_achieved` tells you which.

### Goal
- `[[[event.type]]]` :: Goal type
- `[[[event.description]]]` :: Goal description
- `[[[event.is_achieved]]]` :: true if goal was hit, false if it expired
- `[[[event.current_amount]]]` :: Final value
- `[[[event.target_amount]]]` :: Target value
- `[[[event.started_at]]]` :: When the goal started
- `[[[event.ended_at]]]` :: When the goal ended

example:
```
[[[if:event.is_achieved]]]
  <div class="goal-hit">[[[event.description]]] - HIT!</div>
[[[else]]]
  <div class="goal-miss">[[[event.description]]] ended at [[[event.current_amount]]] / [[[event.target_amount]]]</div>
[[[endif]]]
```

note: maps to the Twitch EventSub event `channel.goal.end`.