Use iterable typehints

[rotexdegba]

rotexsoft/leanorm#28

[rotexdegba]

This issue is pointless now since variadic parameter signatures are now used in the Collection constructor and the Model's createNewCollection methods. Users looking to create collection objects directly via the collection constructor or via a Model's createNewCollection are now forced by the variadic signature to unpack an array of items that are strictly of \GDAO\Model\RecordInterface or its sub-types.

// CollectionInterface

public function __construct(
    \GDAO\Model $model, \GDAO\Model\RecordInterface ...$data
);


// Model

public function createNewCollection(\GDAO\Model\RecordInterface ...$list_of_records): \GDAO\Model\CollectionInterface { //...}