This package is also pretty old, as upstream is at 5.6.0. It seems upstream tests for 3.10 in their CI and it passes? I would argue the "right" course of action here, instead of adding a Debian-specific patch, would be to update the package to the latest upstream version.
Cheers, -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Louis-Philippe Véronneau ⢿⡄⠘⠷⠚⠋ po...@debian.org / veronneau.org ⠈⠳⣄
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