Add required_ruby_version to gemspec.
Add required_ruby_version to gemspec.

chriswoodrich/lita,tristaneuan/lita,prsimp/lita,elia/lita,liamdawson/lita,natesholland/lita,liamdawson/lita,crimsonknave/lita,jimmycuadra/lita,PatrickTulskie/lita,crimsonknave/lita,MatthewKrey/lita,elia/lita,MatthewKrey/lita,natesholland/lita,mcgain/lita,byroot/lita,brodock/lita,sadiqmmm/lita,jimmycuadra/lita,tristaneuan/lita,brodock/lita,mcgain/lita,sadiqmmm/lita,litaio/lita,litaio/lita,jaisonerick/lita,chriswoodrich/lita,byroot/lita,jaisonerick/lita