This package is designed to parse existing cron expressions as well as create new expressions using a human friendly fluent API.
It can calculate if a given expression is due for running at the current time and also determine past and future run schedules.
This package is inspired by the amazing PHP cron expression package by @mtdowling.
A cron expression is a string that denotes the schedule in which certain commands should be executed. Given below is the basic structure of a cron.
*    *    *    *    *    *
-    -    -    -    -    -
|    |    |    |    |    |
|    |    |    |    |    + year [optional]
|    |    |    |    +----- day of week (0 - 7) (Sunday=0 or 7)
|    |    |    +---------- month (1 - 12)
|    |    +--------------- day of month (1 - 31)
|    +-------------------- hour (0 - 23)
+------------------------- min (0 - 59)
//TODO: WIP