Install Node.js 16 and 18 by default (and 20 additionally) (#98)

* Install Node.js 16 and 18 by default (and 20 additionally)

* Use caching for go test

linux/ubuntu/scripts/js.sh

@@ -20,8 +20,8 @@ echo '[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm' | tee
 printf "\n\t🐋 Installed NVM 🐋\t\n"
 nvm --version
 
-# node 12 and 16 are installed already in act-*
-versions=("14")
+# node 16 and 18 are already installed in act-*
+versions=("20")
 JSON=$(wget -qO- https://nodejs.org/download/release/index.json | jq --compact-output)
 
 for V in "${versions[@]}"; do