Add package for BATS (#3611)
Add package for BATS (#3611)

Add package for the BASH Automated Testing System.
lgarren/spack,krafczyk/spack,LLNL/spack,LLNL/spack,skosukhin/spack,LLNL/spack,mfherbst/spack,krafczyk/spack,lgarren/spack,TheTimmy/spack,mfherbst/spack,iulian787/spack,matthiasdiener/spack,lgarren/spack,skosukhin/spack,skosukhin/spack,tmerrick1/spack,TheTimmy/spack,EmreAtes/spack,iulian787/spack,tmerrick1/spack,iulian787/spack,iulian787/spack,mfherbst/spack,TheTimmy/spack,LLNL/spack,lgarren/spack,matthiasdiener/spack,TheTimmy/spack,EmreAtes/spack,krafczyk/spack,TheTimmy/spack,matthiasdiener/spack,EmreAtes/spack,tmerrick1/spack,lgarren/spack,iulian787/spack,skosukhin/spack,matthiasdiener/spack,mfherbst/spack,EmreAtes/spack,LLNL/spack,EmreAtes/spack,mfherbst/spack,skosukhin/spack,krafczyk/spack,krafczyk/spack,tmerrick1/spack,tmerrick1/spack,matthiasdiener/spack