added codecov token

Author: cudmore

.github/workflows/test.yml

@@ -39,9 +39,11 @@ jobs:
             tests/
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
-          file: ./coverage.xml
+          files: ./coverage.xml
           flags: unittests
           name: codecov-umbrella
           fail_ci_if_error: false
+          token: ${{ secrets.CODECOV_TOKEN }}
+          verbose: true