Merge #3126

3126: scripts/publish.py: replace toposort dependency with python std graphlib module r=epilys a=epilys

Python standard library already includes a topological sorter: https://docs.python.org/3/library/graphlib.html

We don't need a third party dependency in scripts/publish.py.

Closes #2965

Co-authored-by: Manos Pitsidianakis <[email protected]>