Add Macos build to Github Actions workflow (#61)

* Add macos compilation to GIthub Actions

.github/workflows/main.yml

@@ -1,20 +1,21 @@
 name: Build libsm64
 
-on:
+on: [push, pull_request]
-  pull_request:
-  push:
-    branches: [master]
 
 jobs:
   Build:
     name: Build libsm64 for ${{ matrix.identifier }}
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
         include:
           - identifier: linux
+            os: ubuntu-latest
           - identifier: windows
+            os: ubuntu-latest
+          - identifier: macos
+            os: macos-latest
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout project
         uses: actions/checkout@v3
@@ -34,7 +35,7 @@ jobs:
         run: |
           echo "OS=Windows_NT" >> $GITHUB_ENV
 
-      - name: (Linux) Install SDL2 and GLEW
+      - name: (Linux) Install dependencies
         if: ${{ startsWith(matrix.identifier, 'linux') }}
         run: |
           sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu `lsb_release -sc` main universe restricted multiverse"
@@ -51,7 +52,7 @@ jobs:
           make test -j`nproc`
 
       - name: Upload build
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: libsm64_${{ matrix.identifier }}
           path: |