Test sauce labs in CI

Author: Pong Li

.github/workflows/npm-publish.yml

@@ -73,6 +73,7 @@ jobs:
       - run: |
           npm ci
           rm -rf ./coverage
+          echo $COVERALLS_REPO_TOKEN
           npm test
           npm run coveralls
           export REMOTE_VERSION=$(npm dist-tag ls immutable-assign | cut -d' ' -f 2)