Security vulnerability in Py

[i540608]

Hi,
thanks for taking care of this library;

One of static analysis tools on my pipeline raised an alert due to the vulnerability found in Py , and it's also used by retry2 package;

I am wondering if could be possible to remove the py from the requirements.txt as it's not actually used here, the Py seems to be deprecated and it has quite high CVE.

Best regards,
Timo

[mcormier]

Looking forward to a 0.9.5 release that fixes this issue.