Usage `UIView.effectiveUserInterfaceLayoutDirection` to detect RTL

• Use UIView.effectiveUserInterfaceLayoutDirection to detect RTL on iOS 10 and above. This is recommended approach to detect layout direction taking into account view's semantic content attribute, trait environment and UIApplication layout direction.
  • Added by MontakOleg in Pull Request #200
• Update Travis to Xcode 11.
  • Added by Luc Dion in Pull Request #202