Update nokogiri requirement from = 1.11.7 to = 1.15.3#1895

dependabot[bot] wants to merge 1 commit intomainNexmo/station:mainfrom

dependabot/bundler/nokogiri-eq-1.15.3Nexmo/station:dependabot/bundler/nokogiri-eq-1.15.3Copy head branch name to clipboard