Set return type of _get_cron_array

[szepeviktor]

array(50) {
  [1737222671]=>
  array(1) {
    ["automatewoo_events_worker"]=>
    array(1) {
      ["40cd750bba9870f18aada2478b24840a"]=>
      array(3) {
        ["schedule"]=>
        string(22) "automatewoo_one_minute"
        ["args"]=>
        array(0) {
        }
        ["interval"]=>
        int(60)
      }
    }
  }
...

Maybe array<int, array<string, array<string, array{schedule:string, args:list<string>, interval:int}>>>

[johnbillion]

https://github.com/johnbillion/wp-crontrol/blob/7fb00ae659701d86254f2044f1cdfccda94b524c/src/event.php#L545-L549