Converts the map to an array.
Maps where non-scalar keys are can't be converted to an array.
            An array will treat all numeric keys as integers,
            eg. "1" and 1 as keys in the map
            will only result in 1 being included in the array.
        
Note:
Casting to an array is not supported yet.
This function has no parameters.
An array containing all the values in the same order as the map.
Example #1 Ds\Map::toArray() example
<?php
$map = new \Ds\Map([
    "a" => 1,
    "b" => 2,
    "c" => 3,
]);
var_dump($map->toArray());
?>
The above example will output something similar to:
array(3) {
  ["a"]=>
  int(1)
  ["b"]=>
  int(2)
  ["c"]=>
  int(3)
}