Merge pull request #28 from swhitty/xcode-15

Add Xcode 15 build

Author: swhitty

.github/workflows/build.yml

@@ -26,10 +26,10 @@ jobs:
         with:
           files: ./coverage_report.lcov
 
-  xcode_14_2:
-    runs-on: macos-12
+  xcode_15_0:
+    runs-on: macos-13
     env:
-      DEVELOPER_DIR: /Applications/Xcode_14.2.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_15.0.app/Contents/Developer
     steps:
       - name: Checkout
         uses: actions/checkout@v3