Only run the variadic arguments test on 5.6+
Only run the variadic arguments test on 5.6+

5outh/mockery,florianeckerstorfer/mockery,florianeckerstorfer/mockery,Big-Shark/mockery,tfrommen/mockery,yeka/mockery,TiagoMaiaL/mockery,fhinkel/mockery,padraic/mockery,5outh/mockery,Big-Shark/mockery,jenswiese/mockery,kminh/mockery,kminh/mockery,tfrommen/mockery,TiagoMaiaL/mockery,fhinkel/mockery,yeka/mockery,jenswiese/mockery