[release] Bump VERSION to 2020.09
[release] Bump VERSION to 2020.09

salortiz/rakudo,salortiz/rakudo,salortiz/rakudo,MasterDuke17/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,rakudo/rakudo,tony-o/rakudo,tbrowder/rakudo,labster/rakudo,MasterDuke17/rakudo,tony-o/rakudo,tony-o/rakudo,labster/rakudo,tony-o/rakudo,tony-o/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo,salortiz/rakudo,salortiz/rakudo,tbrowder/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,MasterDuke17/rakudo