message: zero value check added for button's active opacity.
diff: @@ -55,7 +55,7 @@ class Button extends Component {
  {...this.prepareRootProps()}
  ref={c => (this._root = c)}
  activeOpacity={
  - this.props.activeOpacity ? this.props.activeOpacity : 0.5
  + this.props.activeOpacity > 0 ? this.props.activeOpacity : 0.5
  }
  >
  {children}
  