Merge pull request #305 from JuliaDiff/gd/add_codecov_token

Add codecov token to CI

Author: ChrisRackauckas

.github/workflows/CI.yml

@@ -40,6 +40,7 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
         with:
           directories: src,ext
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
+          token: ${{ secrets.CODECOV_TOKEN }}
           files: lcov.info