add coverage

Author: AbdulmalikGiwa

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
         run: cargo tarpaulin --exclude-files tests/* --out Xml --output-dir coverage
 
       - name: Upload Coverage Report
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: coverage-report
           path: coverage