Can we get tag annotations

Is it possible to fetch the tag title and annotations for each tag, subsequently add them to each tag's description?

```markdown
## [v1.7.5f](https://github.com) (2019-06-21)
[Full Changelog](https://github.com)

**Description:**
*Tag's title goes here*

- *Tag's annotations goes here*

**Merged pull requests:**
...
```

https://github.com/github-changelog-generator/github-changelog-generator/blob/f73e689ef1d4b8726aa39c4dc5cc8671da0d45e2/lib/github_changelog_generator/octo_fetcher.rb#L109

I'm not familiar with Ruby otherwise I would raise a PR for this.

Start in lib/github_changelog_generator/octo_fetcher.rb around line 109 and trace how tags are fetched and passed into changelog rendering. Check the existing generated Markdown structure, then verify that each tag's title and annotations appear in its description without disrupting the other sections.

Written by the indexing model from the issue text.