Update workflow steps in main.yml

Renamed 'build' step to 'Build' and added 'Test' step.

Author: xxoo

.github/workflows/main.yml

@@ -23,6 +23,10 @@ jobs:
       run: npm -g install node-gyp
       shell: cmd
 
-    - name: build
+    - name: Build
       run: node-gyp rebuild
       shell: cmd
+
+    - name: Test
+      run: node test.js
+      shell: cmd