HACKING.adoc in asciidoctor-revealjs-4.0.0 vs HACKING.adoc in asciidoctor-revealjs-4.0.1

@@ -314,9 +314,10 @@
 +
     bundle update
     bundle exec rake build
     bundle exec rake test
     bundle exec rake examples:convert
+    npm install
     npm update --no-save
     bundle exec rake build:js
     npm test
     npm run examples