[Rpy] rpy2-3.4.2 is release and on pypi

[Laurent G. <lga...@gm...>]

Hi,

rpy2-3.4.2 is released. This is a bugfix release mostly addressing an issue
with multithreading.
The changelog is here:
https://rpy2.github.io/doc/v3.4.x/html/changes.html#release-3-4-2

Best,

Laurent