ember-dragula: Submit PR to remove component lifecycle deprecation

# Problem

We are currently using ember-dragula for our task board.

At the moment, there is a deprecation in ember triggered by this addon, due to component lifecycle hooks.

https://emberjs.com/deprecations/v2.x/#toc_arguments-in-component-lifecycle-hooks

I've created an (issue in their repository](https://github.com/kalcifer/ember-dragula/issues/27)

## Subtasks
- [ ] If the issue has not been resolved yet, submit a PR to the ember-dragula repo
- [ ] Once the issue has been resolved and the change released as a new version, update the dependency here
- [ ] If the deprecation is gone, we can consider this issue closed.

## References

Progress on: #

首先查看報告中連結的 ember-dragula issue，並確認其元件生命週期棄用是否已經解決。如果尚未解決，請在那裡提交所需的變更；一旦存在已發布的版本，就在此 repository 中找到 ember-dragula 相依性，更新它，並驗證該棄用是否已消失。

由索引模型根據 Issue 內容生成。