[BUG] - Data Race in RunCount

[seunghyupoh3517]

Describe the bug

=== RUN   TestTimeoutJob
==================
WARNING: DATA RACE
Write at 0x00c000598920 by goroutine 124:
  github.com/go-co-op/gocron.(*Scheduler).run()
      /home/circleci/go/pkg/mod/github.com/go-co-op/gocron@v1.16.1/scheduler.go:554 +0x106a
  github.com/go-co-op/gocron.(*Scheduler).runContinuous()
      /home/circleci/go/pkg/mod/github.com/go-co-op/gocron@v1.16.1/scheduler.go:566 +0x8e
  github.com/go-co-op/gocron.(*Scheduler).runContinuous.func1()
      /home/circleci/go/pkg/mod/github.com/go-co-op/gocron@v1.16.1/scheduler.go:579 +0x237

Previous read at 0x00c000598920 by goroutine 98:
  github.com/go-co-op/gocron.(*Job).RunCount()
      /home/circleci/go/pkg/mod/github.com/go-co-op/gocron@v1.16.1/job.go:437 +0xbc
  github.com/fluxninja/aperture/pkg/jobs.(*jobExecutor).jobInfo()
      /root/project/pkg/jobs/job.go:235 +0x94
  github.com/fluxninja/aperture/pkg/jobs.(*JobGroup).JobInfo()
      /root/project/pkg/jobs/job-group.go:277 +0x1d2
  github.com/fluxninja/aperture/pkg/jobs.(*groupConfig).OnJobCompleted()
      /root/project/pkg/jobs/jobs_test.go:69 +0xda
  github.com/fluxninja/aperture/pkg/jobs.runTest()
      /root/project/pkg/jobs/jobs_test.go:105 +0x925
  github.com/fluxninja/aperture/pkg/jobs.TestTimeoutJob()
      /root/project/pkg/jobs/jobs_test.go:189 +0x32d
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      /usr/local/go/src/testing/testing.go:1493 +0x47

Goroutine 124 (running) created at:
  time.goFunc()
      /usr/local/go/src/time/sleep.go:176 +0x47

Goroutine 98 (running) created at:
  testing.(*T).Run()
      /usr/local/go/src/testing/testing.go:1493 +0x75d
  testing.runTests.func1()
      /usr/local/go/src/testing/testing.go:1846 +0x99
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1446 +0x216
  testing.runTests()
      /usr/local/go/src/testing/testing.go:1844 +0x7ec
  testing.(*M).Run()
      /usr/local/go/src/testing/testing.go:1726 +0xa84
  main.main()
      _testmain.go:1043 +0x3da
==================

To Reproduce

Steps to reproduce the behavior:
When *Scheduler.run(), scheduler is executing the job and in another go routine, tries to access the JobInfo using Job.RunCount(), Job.NextRun(), Job.LastRun(), Job.RunCount() is not being protected by mutex and leads to data race.

Version

github.com/go-co-op/gocron@v1.16.1

Expected behavior

There shouldn't be data race when *Scheduler.run()

Additional context

[seunghyupoh3517]

@JohnRoesler I have added quick fix for this data race, please take a look!