Includes 
by null @kynefuk
Implement the JavaScript `Array.includes` function in the type system. A type takes the two arguments. The output should be a boolean `true` or `false`.
For example:
```ts
type isPillarMen = Includes<['Kars', 'Esidisi', 'Wamuu', 'Santana'], 'Dio'> // expected to be `false`
```
