Deps checkout submodules

Author: davegaeddert

.github/workflows/deps.yml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+      with:
+        submodules: true
     - uses: actions/setup-python@v2
       with:
         python-version: 3.x