Merge pull request Pyomo#3509 from mrmundt/highspy-patch

BUGFIX: Add logic for highspy versions

Author: michaelbynum

Diff for: pyomo/contrib/appsi/solvers/highs.py

@@ -273,7 +273,8 @@ def _solve(self, timer: HierarchicalTimer):
                 self._warm_start()
             timer.start('optimize')
             ostreams[-1].write("RUN!\n")
-            self._solver_model.HandleKeyboardInterrupt = True
+            if self.version()[0] >= 1 and self.version()[1] >= 8:
+                self._solver_model.HandleKeyboardInterrupt = True
             self._solver_model.run()
             timer.stop('optimize')