.github/workflows: extend testing matrix

.github/workflows/interop.yml

@@ -2,6 +2,7 @@ name: Interoperability tests
 on: push
 jobs:
   trigger:
+    name: Trigger
     runs-on: ubuntu-latest
     steps:
       - name: Trigger interoperability tests in str4d/rage

.github/workflows/test.yml

@@ -1,10 +1,22 @@
-name: Go tests
 on: [push, pull_request]
+name: Go tests
 jobs:
   test:
-    runs-on: ubuntu-latest
+    name: Test
+    strategy:
+      fail-fast: false
+      matrix:
+        go: [1.14.x, 1.x]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/setup-go@v2
-        with: { go-version: 1.x }
-      - uses: actions/checkout@v2
-      - run: go test -race ./...
+      - name: Install Go ${{ matrix.go }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go }}
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      # - name: Run analyses
+      #   run: go run analysis.go ./...
+      - name: Run tests
+        run: go test -race ./...