use CodeCov upload

[spencerlepine]

Issue #43

coverage_upload:
    needs: [node_ci]
    environment: CI
    name: CodeCov upload

    steps:
      - name: "⬇️ Download the client test coverage report"
        uses: actions/download-artifact@v3
        with:
          name: client-coverage-file

      - name: "📜 Copy the client coverage file"
        run: |
          mv coverage-final.json coverage-final-client.json

      - name: "⬇️ Download the server test coverage report"
        uses: actions/download-artifact@v3
        with:
          name: server-coverage-file

      - name: "📜 Copy the server coverage file"
        run: |
          mv coverage-final.json coverage-final-server.json

      - name: "🌪️ Publish to CodeCov"
        uses: codecov/codecov-action@v2
        with:
          token: ${{ secrets.CODECOV_TOKEN }} # not required for public repos
          flags: unittests
          files: ./coverage-final-client.json,./coverage-final-server.json
          name: codecov-umbrella # optional
          fail_ci_if_error: true # optional (default = false)
          # verbose: true # optional (default = false)