Add TruffleRuby 19.3.1
Add TruffleRuby 19.3.1

sstephenson/ruby-build,makandra/ruby-build,ryanfb/ruby-build,dark-panda/ruby-build,OiNutter/node-build,dark-panda/ruby-build,nodenv/node-build,rbenv/ruby-build,rbenv/ruby-build