ci: fix coveralls crash

Signed-off-by: Francisco Buceta <frbuceta@gmail.com>

Author: frbuceta

.github/workflows/continuous-integration.yml

@@ -55,6 +55,7 @@ jobs:
         with:
           flag-name: run-${{ matrix.os }}-node@${{ matrix.node-version }}
           github-token: ${{ secrets.GITHUB_TOKEN }}
+          file: coverage/lcov.info
           parallel: true
 
   post-test: