Dependency on core-js@2 which is no longer maintend

[humphreyn]

Hi,
Currently xregexp has a dependency on @babel/runtime-corejs@2 and in turn has a dependency on core-js@2 which according to the developers "is no longer maintained and not recommended for usage due to the number of issues".

Do you have plans to upgrade to @babel/runtime-corejs@3 which uses core-js@3.

[tdjastrzebski]

This becomes a real issue. Not to mention core-js runs postinstall script displaying info about the author looking for a job when installing packages which depend on it, even indirectly. I think adding such messages is not a standard, well-seen practice. It just looks bad.