Ruby 3.1 / psych 4.0 YAML#safe_load requires permitted classes in keyword parameter #23
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Since psych 4.0,
YAML#safe_load
requires the permitted classes in keyword parameterpermitted_classes
. Ruby 3.1 ships with psych 4.0.This PR adds Ruby 3.1 to the GitHub Actions matrix, and updates the calls to
YAML#safe_load
checking if the method accepts keyword parameterpermitted_classes
(available since psych 3.1.0).For older versions of psych (not accepting
YAML#safe_load
keyword parameterpermitted_classes
; up to psych 3.0.3), the permitted classes are specified a second positional parameter (whitelisted_classes
psych <=3.0.3,legacy_permitted_classes
psych >=3.1.0 <4.0.0)Closes #22.