ci(workflows): make test less flaky

- Some execution do not wait for result and uses timeout to ensure completion
- However these tests are vulnerable to parallel execution, which may cause timeout happen earlier than execution
- This commit sets --runInBand in workflow file to ensure one test is run every time

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
       - run: npm run lint
       - run: npm run typecheck
       - run: npm run i18n:validate
-      - run: npm run test --ignore-scripts -- --coverage
+      - run: npm run test --ignore-scripts -- --coverage --runInBand
       - name: Update coveralls
         uses: coverallsapp/github-action@master
         with: