add sndfile

.github/workflows/ci.yaml

@@ -37,6 +37,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install sndfile
         pip install -r requirements.txt
         pip install black pytest-cov
     - name: Install enhancer
@@ -44,7 +45,7 @@ jobs:
           pip install -e .[dev,testing]
     - name: Run black
       run:
-        black --check .  --exclude enhancer/version.py
+        black --check .  --exclude enhancer/version.pyß
     - name: Test with pytest
       run:
         pytest tests --cov=enhancer/