`require-computed-macros` auto fixes to deprecated code

```js
filteredItems: computed('items.@each.isFiltered', function() {
return this.items.filterBy('isFiltered');
}),
```

Becomes:

```js
filteredItems: computed.filterBy('items', 'isFiltered'),
```

However, `computed.` properties are deprecated per https://deprecations.emberjs.com/v3.x#toc_deprecated-run-loop-and-computed-dot-access.

It should be:

```js
import { filterBy } from '@ember/object/computed';

// SNIP

filteredItems: computed.filterBy('items', 'isFiltered'),
```