Update swift.yml

Signed-off-by: David Nadoba <[email protected]>

Author: dnadoba

.github/workflows/swift.yml

@@ -8,15 +8,16 @@ on:
 
 jobs:
   test-on-macOS-and-iOS:
-    runs-on: macos-latest
+    runs-on: macos-11
     strategy:
       matrix:
-        xcode: ['13.0']
-    env:
-      DEVELOPER_DIR: /Applications/Xcode_13.0.app/Contents/Developer
+        xcode: ['12.5.1', '13.0']
+
     steps:
-    
     - uses: actions/checkout@v2
+    - uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: ${{ matrix.xcode }}
     - name: Test on iOS Simulator
 
       run: >
@@ -38,9 +39,16 @@ jobs:
         -destination 'platform=macOS'
         
   performance-tests-on-macOS:
-    runs-on: macos-latest
+    runs-on: macos-11
+    strategy:
+      matrix:
+        xcode: ['12.5.1', '13.0']
+
     steps:
     - uses: actions/checkout@v2
+    - uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: ${{ matrix.xcode }}
     - name: Build & Run Performance Tests on macOS
       env:
         DEVELOPER_DIR: ${{ matrix.xcode }}