Add [toml] dependency because 3.9 doesn't have builtin toml

.github/workflows/run_all_frameworks.yml

@@ -110,7 +110,7 @@ jobs:
           source venv/bin/activate
           python -m pip install --upgrade pip
           pip install -r requirements.txt
-          pip install coverage
+          pip install coverage[toml]
           pip show openml
       - name: Run constantpredictor on openml iris
         run: |
@@ -159,7 +159,7 @@ jobs:
         source venv/bin/activate
         python -m pip install --upgrade pip
         python -m pip install -r requirements.txt
-        python -m pip install coverage
+        python -m pip install coverage[toml]
     - name: Run ${{ matrix.framework }} on ${{ matrix.task }}
       run: |
         source venv/bin/activate

requirements-dev.txt

@@ -1,7 +1,7 @@
 pytest
 pytest-mock
 pip-tools
-coverage
+coverage[toml]
 
 types-psutil
 types-xmltodict