Close pool in Cleanup to prevent Get getting stuck in concurrent scenarios.

[zeoxisca]

Close pool in Cleanup to prevent Get getting stuck in concurrent scenarios.

Like case below

func foobar1(ctx context.Context) {
  go func() {
      ...
      page, err := pagePool.Get( )                    // may stuck in Get
      ...
  }()
  
  select {
     case ctx.Done:    
            pagePool.Cleanup(func(){  xxxxxx   })
            browser.Close()     // browser closed and pagePool closed 
  }
}

Development guide

Link

Test on local before making the PR

go run ./lib/utils/simple-check