Some issues in the template

First I should say, I like the theme, modern and beautiful!

Here are some issues found in the template:

1. Paginate, I found there's setting in _config.yml and do plugin needed in Gemfile, but not working after I tried
2. Vulnerability warning from Github after commit, says like Jekyll version is too low to match Github's suggestion (at least to 3.6.3) PS: modify Gemfile and _config.yml, fixed

Hope to hear your answer, thanks.