Feature: `countWords`

Returns the number of words contained in the input text.

```javascript
  countWords(); // => 0
  countWords(''); // => 0
  countWords('     ') // => 0
  countWords('Hello   World') // => 2
  countWords('Hello   World    !!') // => 2
```

**Aliases**

```javascript
import countWords from '@plexis/count-words';
import {countWords} from 'plexis';
```