Fix blinker package version for pytest.

.github/workflows/user_geneset_tests.yml

@@ -80,6 +80,8 @@ jobs:
         run: pip install selenium-wire
       - name: Install Webdriver Manager
         run: pip install webdriver-manager
+      - name: Install Blinker
+        run: pip install blinker==1.7.0
       - name: Run App Tests
         run: pytest test_user_genesets.py
         working-directory: src/tests