[CI] Build-only for tvOS and watchOS (#20)

Author: davdroman

.github/workflows/ci.yml

@@ -11,18 +11,16 @@ on:
     - cron: '3 3 * * 2'  # 3:03 AM, every Tuesday
 
 concurrency:
-  group: ${{ github.ref }}
+  group: ci-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
   macOS:
     name: ${{ matrix.platform }} (Swift ${{ matrix.swift }})
-    runs-on: ${{ matrix.os }}
+    runs-on: macos-12
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - macos-12
         platform:
           - iOS
           - macOS
@@ -32,10 +30,17 @@ jobs:
           - 5.5
           - 5.6
           - 5.7
+        include:
+          - action: test
+          - platform: tvOS
+            action: build
+          - platform: watchOS
+            action: build
     steps:
     - uses: actions/checkout@v2
     - uses: mxcl/xcodebuild@v1
       with:
+        action: ${{ matrix.action }}
         platform: ${{ matrix.platform }}
         swift: ~${{ matrix.swift }}
         scheme: TextBuilder