Add macos-13 to the bulid matrix

Signed-off-by: Martynas Gurskas <[email protected]>

.github/workflows/cpp.yml

@@ -19,7 +19,7 @@ jobs:
       matrix:
         # Ubuntu-20.04 is being used here on purpose instead of ubuntu-latest due to a bug with clang and libstdc++
         # https://github.com/actions/runner-images/issues/8659
-        os: [ubuntu-20.04, windows-latest]
+        os: [ubuntu-20.04, windows-latest, macos-13]
         build_type: [Release]
         cpp_compiler: [g++, clang++, cl]
         exclude:
@@ -29,6 +29,8 @@ jobs:
             cpp_compiler: clang++
           - os: ubuntu-20.04
             cpp_compiler: cl
+          - os: macos-13
+            cpp_compiler: cl
 
     steps:
     - uses: actions/checkout@v3