Short answer: select the minimum versions you have tested.

Given these are core modules, a reasonable thing to do would be to consider the minimum version of perl you think you'd be prepared to support, install it locally (eg with perlbrew) to check that your tests pass on that version, and then specify the versions that shipped with that release.

I don't know anything about Stripe, but I'm guessing that a good number of the type of people that would want to use your module will be small-business owners that would not want to modify the perl their OS ships with (nor install an additional perl), so the earlier the version you can support the more people you will be able to serve.

Perl ships with a program corelist which will help with information about versions of modules in the various releases of perl it knows about. Note that when it says "Digest::SHA was first released with perl v5.9.3", a development release, that implies the first full release will have been v5.10.0:

% perl -v | head -2
This is perl 5, version 26, subversion 1 (v5.26.1) built for x86_64-li
+nux-gnu-thread-multi

% corelist Digest::SHA
Data for 2017-09-22
Digest::SHA was first released with perl v5.9.3

% corelist Digest::SHA -v 5.10.0
Digest::SHA 5.45

% corelist -a Digest::SHA | grep '[02468]\.0 '
  v5.10.0    5.45
  v5.12.0    5.47
  v5.14.0    5.61
  v5.16.0    5.71
  v5.18.0    5.84
  v5.20.0    5.88
  v5.22.0    5.95
  v5.24.0    5.95
  v5.26.0    5.96
%

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In reply to Re: Deciding dependency versions by hv
in thread Deciding dependency versions by Bod

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