possible missing packages for python 3.9 stdlib

[alan-barzilay]

Hi! Sorry if I'm missing something obvious, but I'm looking at the lists of python 3.X stdlib packages and they all keep incrementing with each version released, except for version 3.9 where it plummets to 886 lines compared to the 1766 lines in version 3.8

Are there any packages missing from the list of version 3.9? Or was there some sort of change in version 3.9 with how the stdlib works?

PS: thank you so much for your work on this project and on keeping it up to date! I'm the new maintainer of pipreqs and I need to update our list of stdlib packages, this is saving so much of my time haha