add check for skipping exist version when publishing to NPM

.github/workflows/npm.yml

@@ -63,7 +63,12 @@ jobs:
           fi  # See: https://stackoverflow.com/a/58869470/1123955
       - name: Is A Publish Branch
         if: steps.check-branch.outputs.match == 'true'
-        run: npm publish
+        run: |
+          VERSION=$(npx pkg-jq -r .version package.json)
+          if npx version-exists @chatie/grpc "$VERSION"
+          then "Version $VERSION exists on NPM, skipped."
+          else npm publish
+          fi
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NODE_AUTH_TOKEN }}
       - name: Is Not A Publish Branch