message: Button: change divs to spans for valid markup
diff: @@ -80,11 +80,11 @@ const Button: FunctionComponent<ButtonProps> = (props: ButtonProps) => {
  Component={restProps.href ? 'a' : Component}
  activeMode="opacity"
  >
  - <div vkuiClass="Button__in">
  - {before && <div vkuiClass="Button__before">{before}</div>}
  + <span vkuiClass="Button__in">
  + {before && <span vkuiClass="Button__before">{before}</span>}
  {children && getContent(size, children, sizeY, platform)}
  - {after && <div vkuiClass="Button__after">{after}</div>}
  - </div>
  + {after && <span vkuiClass="Button__after">{after}</span>}
  + </span>
  </Tappable>;
  };
  