Regenerate gemspec for version 0.5.21
Regenerate gemspec for version 0.5.21

Borzik/sorcery,wasabia/bnbtripSorcery,ikhakoo/sorcery,webgago/sorcery,Sorcery/sorcery,wendy0402/sorcery,NoamB/sorcery,creepycheese/sorcery,jshum/sorcery,trustyknave/sorcery,Borzik/sorcery,Sology/sorcery,kristianmandrup/sorcery,wasabia/bnbtripSorcery,kristianmandrup/sorcery,rubenmoya/sorcery,jerefrer/sorcery,jerefrer/sorcery,wendy0402/sorcery,alexanderedge/sorcery,Sology/sorcery,Sorcery/sorcery,ikhakoo/sorcery,creepycheese/sorcery,Sorcery/sorcery,athix/sorcery,jshum/sorcery,athix/sorcery,athix/sorcery,rubenmoya/sorcery,webgago/sorcery,NoamB/sorcery,alexanderedge/sorcery,trustyknave/sorcery