ci: add dummy OPENAI_API_KEY, upgrade setuptools in CI

Author: rawqubit

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          python -m pip install --upgrade pip setuptools wheel
           pip install -r requirements.txt
           pip install pytest flake8
           pip install -e .
@@ -35,3 +35,5 @@ jobs:
 
       - name: Run tests
         run: pytest tests/ -v --tb=short
+        env:
+          OPENAI_API_KEY: sk-dummy-key-for-ci-testing-only