After sorting, empty strings are at the beginning of the sorted array

```js
const array = [
  { title: 'b' },
  { title: '' },
  { title: 'a' }
]

console.log(array.sort(sortBy('title')))
```

Output:

```js
[
  { title: '' },
  { title: 'a' },
  { title: 'b' }
]
```

Expected output:

Since it's sorting by string, I'd expect empty strings to be last in the array:

```js
[
  { title: 'a' },
  { title: 'b' },
  { title: '' }
]
```