Expose job data, bugfixes, start immediately default

Added

• Expose the Job's lastRun, nextRun and runCount (#83) @arjunmahishi

Changed

• scheduleNextRun now uses duration (#79) @Streppel
• Start jobs immediately by default - StartImmediately() has been deprecated (#82) @JohnRoesler
  • To achieve the prior behavior of starting after the interval, use StartAt()

    s := gocron.NewScheduler(time.UTC)
    _, _ = s.Every(1).Hour().StartAt(time.Now().Add(time.Hour() * 1)).Do(task)
    s.StartBlocking()
    

Fixed

• Re-set the job's last run in scheduler run() (#81) @JohnRoesler
• Fix runnableJobs where subsequent jobs are never checked (#87) @JohnRoesler
• Handle job creation errors (#89) @arjunmahishi

Removed

• Non-working distributed lock (#77) @Streppel

Chores

• Add funding doc d12fdaf b7cd523 😃 @JohnRoesler