Expand field from search isn't parsed

## Is your feature request related to a problem? Please describe.

You can add "expand" field to the search request
https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issue-search/#api-rest-api-3-search-get
https://pkg.go.dev/github.com/andygrunwald/go-jira?utm_source=godoc#SearchOptions
So if you add "names" or "schema" for example, you can't get them from the result, because library will read the body, and will not parse this fields

## Describe the solution you'd like

Add this fields into [searchResult](https://github.com/andygrunwald/go-jira/blob/master/issue.go#L515) and somehow return them from Search function

## Describe alternatives you've considered

I can make the request myself, but it's strange, that you can add "expand" in request, but can't read the result