https://github.com/jekyll/jekyll/blob/master/jekyll.gemspec#L32 has Ruby `>=2.5.0`, but https://github.com/jekyll/jekyll/blob/master/.rubocop.yml#L16 targets Ruby `2.7`. Choosing Ruby 2.7.0 in `jekyll.gemspec` would mitigate this and also solve https://github.com/jekyll/jekyll/issues/9160.
https://github.com/jekyll/jekyll/blob/master/jekyll.gemspec#L32 has Ruby
>=2.5.0, but https://github.com/jekyll/jekyll/blob/master/.rubocop.yml#L16 targets Ruby2.7.Choosing Ruby 2.7.0 in
jekyll.gemspecwould mitigate this and also solve #9160.