Add Pint in dev dependencies

[Roberto Butti]

Add Pint

composer require laravel/pint --dev

instead of phpcsfixer.
Use the preset PER
https://www.php-fig.org/per/coding-style/

Update also the composer script, replacing php cs fixer with pint

[Sebastião Sukuakueche]

@roberto-butti Can I work on this issue?
@aosccode

[Roberto Butti]

Of course @sukuasoft , I'm assigning it to you.
Thank you.

[Roberto Butti]

closed by #39