Add codecov token (#129)

Author: devmotion

.github/workflows/CI.yml

@@ -34,4 +34,6 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v4
         with:
+          token: ${{ secrets.CODECOV_TOKEN }} # required
+          fail_ci_if_error: true
           file: lcov.info