enforce requirements (#38)

Author: splch

.github/workflows/test_notebooks.yml

@@ -16,10 +16,10 @@ jobs:
 
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -U pip
+        pip install -r requirements.txt
 
-    - name: Run Notebook Tests
+    - name: Run notebook tests
       run: python tests/test_notebooks.py
       env:
         IONQ_API_KEY: ${{ secrets.IONQ_API_KEY }}