add ci step to upload artifacts

Author: umbynos

.github/workflows/test.yml

@@ -51,6 +51,13 @@ jobs:
       - name: Run unit tests
         run: task test-unit
 
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: arduino-create-agent-${{ matrix.operating-system }}
+          path: arduino-create-agent
+          if-no-files-found: error
+
       # - name: Send unit tests coverage to Codecov
       #   if: >
       #     matrix.operating-system == 'ubuntu-latest' &&