Publish to open vsx (#421)

Author: kddejong

.github/workflows/publish.yaml

@@ -17,10 +17,13 @@ jobs:
     - name: Setup NPM
       run: |
         npm install
-        npm install -g vsce
+        npm install -g vsce ovsx
         npm run compile
     - name: Publish
       if: success()
-      run: vsce publish
+      run: |
+        vsce publish
+        ovsx publish
       env:
-        VSCE_PAT: ${{ secrets.VSCE_PAT }}
+        VSCE_PAT: ${{ secrets.VSCE_PAT }}
+        OVSX_PAT: ${{ secrets.OVSX_PAT }}