Merge pull request #19 from hannesa2/UpdateXCodeCI

Update Xcode for CI

Author: hannesa2

.github/workflows/BuildPR.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        xcode: [Xcode_11.7, Xcode_12.2, Xcode_12.4]
+        xcode: [Xcode_12.5, Xcode_13.1, Xcode_13.2, Xcode_13.0, Xcode_12.4]
     steps:
       - name: Checkout
         uses: actions/checkout@v2.4.0