Merge pull request rowanj#218 from gitx/BuildMultipleXCodeVersions

Build multiple Xcode versions

Author: hannesa2

.github/workflows/BuildPR.yml

@@ -6,14 +6,17 @@ jobs:
   build-gitx:
     name: build-gitx
     runs-on: macOS-latest
+    strategy:
+      matrix:
+        xcode: [Xcode_12.2, Xcode_12.3, Xcode_12.4]
     steps:
       - name: Checkout
         uses: actions/[email protected]
         with:
           fetch-depth: 0
           submodules: recursive
       - name: Set XCode Version
-        run: sudo xcode-select -s /Applications/Xcode_12.2.app
+        run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app
       - name: pre build
         run: cd External/objective-git && script/bootstrap && script/update_libgit2 && cd ../..
       - name: Build project