Bump nokogiri from 1.8.5 to 1.13.6 in /2018#19

dependabot[bot] wants to merge 1 commit intomasterspaceappsnyc/spaceappsnyc.github.io:masterfrom

dependabot/bundler/2018/nokogiri-1.13.6spaceappsnyc/spaceappsnyc.github.io:dependabot/bundler/2018/nokogiri-1.13.6Copy head branch name to clipboard