superbuild: update for Qt 5.12.9
Also brings in:
- CMake minimum is now 3.12
- Passing Fortran compiler for MPI consumers
Fixes: #166 (closed)
Cc: @chart3388
System updates will be applied on Nov 25th between 7am and 9am, EST (UTC-05:00). This site will have intermittent downtime during that time.
Also brings in:
Fixes: #166 (closed)
Cc: @chart3388