Pull request #750: CAS-14046 plotms feature to select and compute Stokes types
Merge in CASA/casa6 from CAS-14046 to master
* commit 'bcf86687ac9cb4f295c84b9b17ab52d281e6186d':
Advance casaplotms in build.conf
Update plotms branch wheel in build.conf
Set plotms branch wheel in build.conf
Advance plotms branch version
Set plotms branch wheel