[Snyk] Security upgrade networkx from 2.2 to 2.6#9

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snyk-bot wants to merge 2 commits intomasterfrom snyk-fix-6b30206295f3446507def1498a060679

+8-10

Commits on Sep 19, 2020

Reformatted README.md for correct rendering on PyPI
RealPolitiX
committed

Commits on Jul 10, 2021

fix: requirements.txt to reduce vulnerabilities
snyk-bot
committed