fix coveralls

.github/workflows/testing.yml

@@ -20,7 +20,6 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r tests-requirements.txt
-        pip install --user --upgrade coverage
         pip install -r requirements.txt
         npm install -g remark-cli remark-validate-links
         npm install -g markdown-link-check
@@ -40,6 +39,7 @@ jobs:
         DOTDROP_WORKERS: 4
     - name: Coveralls
       run: |
+        pip install coveralls
         coveralls --service=github
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}