message: feat(GridItem): improve accessbility
diff: @@ -85,6 +85,8 @@ export default createComponent({
  <div class={[bem({ square })]} style={this.style} onClick={this.onClick}>
  <div
  style={this.contentStyle}
  + role={clickable ? 'button' : null}
  + tabindex={clickable ? 0 : null}
  class={[
  bem('content', {
  center,
  