added setuptools to builddoc.yml

.github/workflows/builddoc.yml

@@ -32,7 +32,9 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        python -m pip install setuptools
         python -m pip install -r ./docs/requirements.txt
+        python -m pip install .
     - name: run pytest
       run: |
         coverage run --branch --data-file=./docs/_static/_external_data/coverage.file -m pytest ./tests/ --junitxml=./docs/_static/_external_data/merge_dicts_test_results.xml --report-log=./docs/_static/_external_data/merge_dicts_test_log.json