👷 add more macOS builders

.github/workflows/macos.yml

@@ -28,27 +28,10 @@ jobs:
         run: cd build ; ctest -j 10 --output-on-failure
 
   xcode_2:
-    runs-on: macos-11
-    strategy:
-      matrix:
-        xcode: [13.2.1, 13.2, 13.1, 13.0, 12.5.1]
-    env:
-      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
-
-    steps:
-      - uses: actions/checkout@v3
-      - name: cmake
-        run: cmake -S . -B build -D CMAKE_BUILD_TYPE=Debug -DJSON_BuildTests=On -DJSON_FastTests=ON
-      - name: build
-        run: cmake --build build --parallel 10
-      - name: test
-        run: cd build ; ctest -j 10 --output-on-failure
-
-  xcode_3:
     runs-on: macos-12
     strategy:
       matrix:
-        xcode: [13.3.1, 13.3]
+        xcode: [13.3.1, 13.3, 13.2.1, 13.2, 13.1]
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
 
@@ -62,7 +45,7 @@ jobs:
         run: cd build ; ctest -j 10 --output-on-failure
 
   xcode_standards:
-    runs-on: macos-10.15
+    runs-on: macos-12
     strategy:
       matrix:
         standard: [11, 14, 17, 20]