Provide vsix artifact for CI builds on master

Author: muhammadsammy

.github/workflows/ci.yml

@@ -45,3 +45,9 @@ jobs:
       env:
         CODE_VERSION: 1.45.0
         DISPLAY: :99.0
+    
+    - name: Upload VSIX build artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: ci-extension-artifact
+        path: ./*.vsix