feat: add praat dependency to tests

.github/workflows/run-tests.yml

@@ -15,6 +15,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
+          sudo apt-get install praat
           python -m pip install --upgrade pip
           pip install -U pip setuptools
           pip install "importlib-metadata>=4.12" coveralls pytest pytest-cov