test(neon): Upload code coverage

.github/workflows/ci.yml

@@ -93,9 +93,27 @@ jobs:
           key: ${{ runner.os }}-electron-${{ hashFiles('./package-lock.json') }}
           path: ~/Library/Caches/electron
 
+      - name: Install cargo-llvm-cov
+        if: matrix.os == 'ubuntu-latst' && rust-toolchain == 'stable'
+        uses: taiki-e/install-action@cargo-llvm-cov
+
+      - name: Set coverage environment variables
+        if: matrix.os == 'ubuntu-latst' && rust-toolchain == 'stable'
+        run: cargo llvm-cov show-env >> $GITHUB_ENV
+
       - name: npm install
         run: npm ci --prefer-offline --no-audit --no-fund
 
+      - name: Generate coverage report
+        if: matrix.os == 'ubuntu-latst' && rust-toolchain == 'stable'
+        run: cargo llvm-cov report --ignore-filename-regex test --codecov --output-path target/codecov.json
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          files: target/codecov.json
+          fail_ci_if_error: true
+
       - name: Allow unprivileged X server
         if: matrix.os == 'ubuntu-latest'
         run: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0