upgrade to support SQLAlchemy 1.4#1

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asadurski wants to merge 4 commits intoscrapinghub:mysqlfrom

asadurski:patch-1

Commits on Jul 16, 2021

restrict SQLAlchemy to versions before 1.4
asadurski
authored

Commits on Mar 26, 2024

IPython compatibility patch
asadurski
committed

Commits on Jul 9, 2024

pin SQLAlchemy version
asadurski
committed

Commits on Jul 18, 2024

upgrade sessions code to SQLAlchemy 1.4 style
asadurski
committed