Need to install runestone

Author: bnmnetp

.github/workflows/python-package.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8']
+        python-version: ['3.7', '3.8', '3.9']
 
     steps:
     - uses: actions/checkout@v2
@@ -32,6 +32,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest
+        pip install .
         if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
     - name: Test with pytest
       run: |