Install submodules

Author: FrancescAlted

.github/workflows/build.yml

@@ -12,10 +12,12 @@ jobs:
         python-version: ["3.10"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
+      with:
+        submodules: 'recursive'
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}