Allow to pass more span metadata to `span` with block

[sekiyama58]

Currently metadata is only allowed in update_span arguments.
For simplicity, it would be nice if we can pass metadata arguments to Tracer.span with block, like

    Tracer.span("span_me_also", resource: "aaa", sql_query: [query: "..."]) do
      ...
    end

[zachdaniel]

AFAIK this is how it works. You should be able to pass in any data on creation that you can on update_span.

[zachdaniel]

Have you confirmed that the metadata set that way is not honored?

[sekiyama58]

Thanks for response.
I have tried again with v2.1.0 and the issue was not confirmed.
It seems I have been confused by dynamic configuration issue that is fixed by 2.1.0 release.
So I'm closing this issue now.

Thanks!