I am also concerned about this and frustrated by the lack of ability to comment on the repo, combined with the apparent reluctance to give any indication as to when this time-sensitive fix will be released along with the deletion of any comments relating to any release. Without this fix, this module will lose significant ease of use when it comes to interacting with RDS.
In the short term I ended up biting the bullet and implementing the proposed fix manually in my affected repositories, however I would have vastly preferred to have been able to just update the MySQL module especially considering this change is very minimal and required very soon.