fix: build script (maybe?)

.github/workflows/python-app.yml

@@ -27,6 +27,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install pytest vyper titanoboa black hy
+        pip install . --upgrade
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - uses: psf/black@stable
     - name: Test with pytest