checkout recursively

.github/workflows/go-check.yml

@@ -9,6 +9,8 @@ jobs:
     name: Go checks
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: recursive
       - uses: actions/setup-go@v2
         with:
           go-version: "1.16.x"

.github/workflows/go-test.yml

@@ -14,6 +14,8 @@ jobs:
     name: Unit tests (${{ matrix.os}}, Go ${{ matrix.go }})
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: recursive
       - uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go }}