Bump nokogiri from 1.8.1 to 1.12.5#15

dependabot[bot] wants to merge 1 commit intomasterjameshamann/jekyll-display-medium-posts:masterfrom

dependabot/bundler/nokogiri-1.12.5jameshamann/jekyll-display-medium-posts:dependabot/bundler/nokogiri-1.12.5Copy head branch name to clipboard