[MacPorts] #40712: SuiteSparse: update to 4.2.1

[MacPorts]

#40712: SuiteSparse: update to 4.2.1
--------------------------+--------------------------------
 Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  SuiteSparse
--------------------------+--------------------------------
 {{{
 $ port livecheck suitesparse
 SuiteSparse seems to have been updated (port version: 4.1.0, new version:
 4.2.1)
 }}}
 There are a number of open tickets about SuiteSparse; perhaps updating it
 will help fix some of them.

 Michael, I'm Cc'ing you because you did the last few commits to the port
 and might already understand what all it's doing.

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Ticket URL: <https://trac.macports.org/ticket/40712>
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