Update python-publish.yml

Author: Matmaus

.github/workflows/python-publish.yml

@@ -24,6 +24,8 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install setuptools wheel
+        python -m pip install .
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Test with pytest
       run: |
         python -m pip install pytest