Go version

Author: grahamgilbert

.github/workflows/coverage.yml

@@ -5,7 +5,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-go@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ env.GO_VERSION }}
       - name: generate test coverage
         run: go test ./... -coverprofile=./cover.out -covermode=atomic -coverpkg=./...
       - name: check test coverage