Change 'Close' button in Author card to 'Done'

[abelsiqueira]

Pull request details

List of related issues or pull requests

Refs: #218

Describe the changes made in this pull request

On Author's screen, while adding a new author, change the Close button and its icon to Done and a checkmark.

Before:

After:

Instructions to review the pull request

cd $(mktemp -d --tmpdir cffinit-pr-218.XXXXXX)
git clone https://github.com/citation-file-format/cffinit .
git checkout 218-use-done-for-author-card
npm install
npm run dev

[jspaaks]

Nicely done good sir, feel free to merge this PR at your convience, then delete the branch. 🥇

[fdiblen]

Looks good. Thanks for the contribution! 🍶

[abelsiqueira]

Thanks