New comment by pfpulux on void-packages repository

https://github.com/void-linux/void-packages/pull/30751#issuecomment-837158828

Comment:
The test failed due to a [problem in greenlet version 0.4.17](https://github.com/python-greenlet/greenlet/pull/198). With 1.1.0 do_check  passed all tests. 

We should update `python3-greenlet`