Use version of Rake that still works with MRI 1.8.7
Use version of Rake that still works with MRI 1.8.7

ferdinandrosario/hiredis-rb,loggator/hiredis-rb,redis/hiredis-rb,ferdinandrosario/hiredis-rb,redis/hiredis-rb,dixiS/hiredis-rb,dixiS/hiredis-rb,loggator/hiredis-rb