Flag if Advanced Custom Fields plugin version is 4.*

## Describe the solution you'd like

On https://docs.wpvip.com/technical-references/plugins/acf-5-and-vip-go/, we prohibit using any ACF version 4:

> Please note that while ACF version 5 can be used on most VIP Go sites (at customer discretion), ACF 4 should not be used.

## What code should be reported as a violation?

```
/*
Plugin Name: Advanced Custom Fields
Plugin URI: http://www.advancedcustomfields.com/
Description: Customise WordPress with powerful, professional and intuitive fields
Version: 4.4.4
Author: Elliot Condon
Author URI: https://www.advancedcustomfields.com
Text Domain: acf
Domain Path: /lang
*/

```

```
/*
Plugin Name: Advanced Custom Fields PRO
Plugin URI: http://www.advancedcustomfields.com/
Description: Customise WordPress with powerful, professional and intuitive fields
Version: 4.4.4
Author: Elliot Condon
Author URI: https://www.advancedcustomfields.com
Text Domain: acf
Domain Path: /lang
*/

```

## What code should *not* be reported as a violation?

```
/*
Plugin Name: Advanced Custom Fields
Plugin URI: https://www.advancedcustomfields.com
Description: Customize WordPress with powerful, professional and intuitive fields.
Version: 5.9.5
Author: Elliot Condon
Author URI: https://www.advancedcustomfields.com
Text Domain: acf
Domain Path: /lang
*/
```

```
/*
Plugin Name: Advanced Custom Fields PRO
Plugin URI: https://www.advancedcustomfields.com
Description: Customize WordPress with powerful, professional and intuitive fields.
Version: 5.9.5
Author: Elliot Condon
Author URI: https://www.advancedcustomfields.com
Text Domain: acf
Domain Path: /lang
*/

```

Finde die vorhandenen Prüfungen für plugin-header und Version sowie deren Tests und vergleiche sie anschließend mit den Beispielen für ACF 4.4.4 und 5.9.5 in diesem Issue. Als erledigt gilt die Aufgabe, wenn ACF und ACF PRO der Version 4.* als Verstöße gemeldet werden, während Version 5.* nicht gemeldet wird, und Tests beide Fälle abdecken.

Vom Indexierungsmodell aus dem Issue-Text verfasst.