Create manual workflow to generate releases

[bobbrodie]

Overview

I was thinking about how we could do releases with fewer clicks and still automating the release notes, so I've built a manual workflow.

Here's how it works:

1. Go to Actions
2. Select Release from the left-hand panel
3. On the right, click the Run workflow button
4. Choose a Version bump type (_patch_, _minor_, or _major_), which will be used in npm version
5. Enter a release overview, which is used in the release notes above "What's new" (Readme.com shows the first line in the changelog list view, so it's good to have something other than "What's new" show)

When you run the workflow, it will:

1. Check out the project
2. Set up Node.js
3. Install the dependencies
4. Set the git username and email
5. Run npm version to bump the package.json and package-lock.json, but we use --no-git-tag-version because it prefixes with a v and we don't want that for this project
6. Uses jq to get the version without v
7. Add package.json and package-lock.json
8. Commit
9. Tag
10. Push to the branch that the workflow was run against
11. Push the tag
12. Get a list of PRs
13. Use the GitHub API (with the gh command) to get a list of PR titles so we don't need all the "by @dependabot" text
14. Create the GitHub release
15. Push the release notes to the Readme.com changelog

Here's an example from my repo: