r-dt: new versions (#10261)
r-dt: new versions (#10261)

* updated release and checksums, also tightened depends_on()

* remove blank line at end of file

* removing new version 0.5

LLNL/spack,LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack