Upgrade codecov-action (v3->v4) to use Node20

Resolves: #141

Signed-off-by: Sergio Arroutbi <[email protected]>

Author: sarroutbi

.github/workflows/coverage.yml

@@ -53,7 +53,10 @@ jobs:
           [ -z "${ninja}" ] && export ninja=$(command -v ninja-build)
           gcovr -r .. -f ../src -f src/ -e ../tests -e tests -x coverage.xml
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
+        env:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: latchset/tang
         with:
           file: build/coverage.xml
           fail_ci_if_error: true # optional (default = false)