add key param to GestureDetector

[HiroyukiTamura]

I think GestureDetector of ItemWidget having Key is useful for integration testing.

[VictorUvarov]

The key should not be associated on the class itself since all descendants of widget already has a key member.

BottomNavyBarItem({
    Key key,
    @required this.icon,
    @required this.title,
    this.activeColor = Colors.blue,
    this.textAlign,
    this.inactiveColor,
  }) {
  super(key:key);
  ...