add submodules

.github/workflows/python-package-conda.yml

@@ -28,11 +28,10 @@ jobs:
     - name: Cache conda
       uses: actions/cache@v2
       env:
-        # Increase this value to reset cache if etc/example-environment.yml has not changed
-        CACHE_NUMBER: 1
+        CACHE_NUMBER: 1  # increment this value to reset cache if environment.yml has not changed
       with:
         path: ~/conda_pkgs_dir
-        key: ${{ runner.os }}-${{ matrix.python-version }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles( matrix.envfile ) }}
+        key: ${{ runner.os }}-${{ matrix.python-version }}-conda-${{ env.CACHE_NUMBER }}
     - name: Install Conda env
       uses: conda-incubator/setup-miniconda@v2
       with:
@@ -41,9 +40,8 @@ jobs:
         add-pip-as-python-dependency: true
         auto-activate-base: false
         activate-environment: madmom
-        # channel-priority: ${{ matrix.channel-priority }}
         environment-file: environment.yml
-        use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
+        use-only-tar-bz2: true  # this needs to be set for caching to work properly
     - name: Conda info
       shell: bash -l {0}
       run: |
@@ -52,7 +50,8 @@ jobs:
     - name: Install madmom
       shell: bash -l {0}
       run: |
-        pip install -e .[tests]
+        pip install -e .
+        git submodule update --init --remote
     - name: Lint with flake8
       shell: bash -l {0}
       run: |