Created by: broccolinisoup
Since the prettier version is changed - I realised there are quite a few formating fixes on my PR and that would be the case for future PRs. I think running prettier on all files helps pushing cleaner PRs. So this PR does that. Let me know what you think. @colebemis
Also gatsby-theme-doctocat version update doesn't seem to have an updated yarn.lock so I added this one here as well.