[ISSUE #181]💚Add codecov ci (#182)

Author: mxsm

.github/workflows/ci.yaml

@@ -43,4 +43,10 @@ jobs:
         run: cargo build --verbose
 
       - name: Test
-        run: cargo test --verbose
+        run: cargo test --verbose
+        
+      - name: Upload coverage reports to Codecov
+        uses: codecov/[email protected]
+        env:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: mxsm/rocketmq-rust