…tructor

Typed properties declared via a class constructor should also be examined by the `NewTypedProperties` sniff as the allowed types for properties are different than those for parameters.

Includes:
* Adding `T_FUNCTION` to the tokens to be examined.
* Splitting the "type checking" logic off into its own method to allow for multiple properties declared in a constructor.

Includes unit tests.

Ref: https://wiki.php.net/rfc/constructor_promotion

Properties declared via a class constructor follow the property type rules, not the parameter type rules, so ignore them for this sniff. These will be examined in the `NewTypedProperties` sniff instead.

Includes unit tests.