message: Update the hypre version requirement when hypre is built with
  CUDA support -- we now require v2.22.0 which has some needed
  bugfixes.
diff: @@ -541,8 +541,8 @@ The specific libraries and their options are:
  URL: https://github.com/hypre-space/hypre and https://www.llnl.gov/casc/hypre
  Options: HYPRE_OPT, HYPRE_LIB.
  Versions: HYPRE >= 2.10.0b (HYPRE built without CUDA)
  - HYPRE >= 2.20.0 (HYPRE built with CUDA, older versions OK?)
  HYPRE >= 2.20.0 (for '--enable-mixedint' support.)
  + HYPRE >= 2.22.0 (HYPRE built with CUDA)
  - METIS, used when MFEM_USE_METIS = YES. If using METIS 5, set
  MFEM_USE_METIS_5 = YES (default is to use METIS 4).
  