Small updates for Python 3.9 (and OpenCV 4.5) compatibility#25

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cweickhmann wants to merge 4 commits intomzucker:masterfrom

cweickhmann:master

Commits on Jan 28, 2021

Fixed print statement to function in `derive_cubic.py` (Python3 compatibility).
cweickhmann
committed
Changed print from statement to function (Python3 compatibility).
cweickhmann
committed

Commits on Mar 2, 2023

Implemented softer failure in case contours have no area or too few spans are found.
Christian Weickhmann
committed
Merge branch 'master' of github.com:cweickhmann/page_dewarp
Christian Weickhmann
committed