update changelog about CVE-2018-7212 (#1389)
update changelog about CVE-2018-7212 (#1389)


ryanshaw/sinatra,JonMidhir/sinatra,jkowens/sinatra,JonMidhir/sinatra,JonMidhir/sinatra,sinatra/sinatra,ryanshaw/sinatra,jkowens/sinatra,jkowens/sinatra,sinatra/sinatra