Build macOS release as Universal Binary (#267)

* Update CMakeLists.txt

* Edit output filename to reflect building as Universal binary

.github/workflows/macos-compile.yml

@@ -24,6 +24,6 @@ jobs:
       - name: Publish packaged artifacts
         uses: actions/upload-artifact@v4
         with:
-            name: spaghetti-mac-x64
+            name: spaghetti-mac-universal
             path: spaghetti-release
             retention-days: 1

CMakeLists.txt

@@ -27,6 +27,9 @@ endif()
 # Set the minimum version of CMake and the deployment target for macOS
 set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment version")
 
+# Set CMake to build as Universal Binary for macOS
+set(CMAKE_OSX_ARCHITECTURES=arm64;x86_64)
+
 # Set the C++ standard and enable the MSVC parallel build option
 set(CMAKE_CXX_STANDARD 20 CACHE STRING "The C++ standard to use")
 set(CMAKE_C_STANDARD 11 CACHE STRING "The C standard to use")