Add swig to brew install for mac (corrects #7777)

Signed-off-by: Matt Liberty <mliberty@precisioninno.com>

Author: maliberty

etc/DependencyInstaller.sh

@@ -587,7 +587,7 @@ Then, rerun this script.
 EOF
         exit 1
     fi
-    brew install bison boost cmake eigen flex fmt groff libomp or-tools pandoc pyqt5 python spdlog tcl-tk zlib
+    brew install bison boost cmake eigen flex fmt groff libomp or-tools pandoc pyqt5 python spdlog tcl-tk zlib swig
 
     # Some systems need this to correctly find OpenMP package during build
     brew link --force libomp