Support\Fluent: should not reference it directly as type

[rentalhost]

Following #19

Once that new Fluent is not recomended, then we should avoid expects it as type in any place, once that we cannot use the real references.

Should not uses Fluent as typehint:

• [x] On functions or methods;
• [x] As function return type;
• [x] As phpdoc type (eg. @property Fluent $fluent);