[MacPorts] #53617: isl: Update to 0.18

[MacPorts]

#53617: isl: Update to 0.18
-------------------------+---------------------------------
  Reporter:  ryandesign  |      Owner:  MarcusCalhoun-Lopez
      Type:  update      |     Status:  accepted
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  isl         |
-------------------------+---------------------------------
Changes (by MarcusCalhoun-Lopez):

 * status:  new => accepted


--
Ticket URL: <https://trac.macports.org/ticket/53617#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS