fixed github action test

Author: sio4

.github/workflows/tests.yml

@@ -13,7 +13,11 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 1
+      - name: Setup Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
       - name: Test
         run: |
-          go test -race ./...
+          go test -race -cover -v ./...
           go install -v ./packr2