Ruby 3.3 is the latest stable version of Ruby

* Fix typos
* Fix incorrect usage of "setup" as a verb.

The term "setup" is a noun, while "set up" is the correct verb form.
In this context, the sentence requires a verb, so changing "setup" to
"set up" is appropriate.

…484)

* docs: provide a basic skeleton example on customizing the babel config

* docs: mention that you have to switch to `babel.config.js` for Yarn PnP

* docs: add changelog entry

* docs: add language to code fence

* fix: manually insert shakapacker using "echo" instead
* manually overwrite "rack" to be v2

* upgrade actions/setup-node to v4
* Fix tests uninitialized constant rack (#501)
* fix: manually insert shakapacker using "echo" instead
* manually overwrite "rack" to be v2
* update changelog

* update gempspec to exclude files
* remove gemfile lock when running tests