message: fix: nvd3 annotation tooltip
diff: font-weight: normal;
  }
  -.d3-tip.nv-event-annotation-layer-table {
  +.d3-tip.nv-event-annotation-layer-table,
  +.d3-tip.nv-event-annotation-layer-NATIVE {
  width: 200px;
  border-radius: 2px;
  background-color: #484848;
  color: #fff;
  }
  -.d3-tip.nv-event-annotation-layer-table::after {
  +.d3-tip.nv-event-annotation-layer-table::after,
  +.d3-tip.nv-event-annotation-layer-NATIVE::after {
  content: '\25BC';
  font-size: 14px;
  color: #484848;
  