Added tvOS tests (#18)

Author: bdrelling

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
     uses: AudioKit/ci/.github/workflows/swift_test.yml@main
     with:
       scheme: AudioKitEX
-      platforms: iOS macOS
+      platforms: iOS macOS tvOS
       swift-versions: 5.5 5.6
 
   # Send notification to Discord on failure.
@@ -22,4 +22,4 @@ jobs:
     uses: AudioKit/ci/.github/workflows/send_notification.yml@main
     needs: [swift_test]
     if: ${{ failure() && github.ref == 'refs/heads/main' }}
-    secrets: inherit
+    secrets: inherit