Use codecov token in CI (#159)

Author: jishnub

.github/workflows/ci.yml

@@ -65,5 +65,6 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v3
         with:
+          token: ${{ secrets.CODECOV_TOKEN }}
           file: lcov.info
-  
+