Log Message:
lang/ruby-execjs: update to 2.8.1

2.8.1 (2021-05-14)

* Wait for STDOUT to be flushed before exiting the node runtime

2.8.0 (2021-05-12)

* Fix Ruby 3.0 compatibility on Windows
* Undefine console, process and other globals. See #43
* Removed the RubyRacer runtime as it is no longer maintained and broken on
  recent rubies.
* Node runtime look for node before nodejs.