Changes of jasync were not ported from 3.6 branch to 3.7 and 3.8

Hi @codepitbull ,
I noticed that some PR's were not ported across branches.
Is there a reason for that or just something missed some how?
Here are few PR examples:
https://github.com/vert-x3/vertx-mysql-postgresql-client/pull/154
https://github.com/vert-x3/vertx-mysql-postgresql-client/pull/141

Thanks,
Ohad.