showArrow does not work

[damozhang]

Describe the bug
When I set the showArrow = false, the arrow does not as expect to hide

To Reproduce
Steps to reproduce the behavior:

var tooltipConfig = DefaultTooltipConfig(side: .top)
init(){
    self.tooltipConfig.showArrow = false
}

Expected behavior
As the document description, set shoArrow can show or hide the arrow.

Screenshots

Desktop (please complete the following information):

• OS: iOS
• SwiftUITootip 1.3.1