Fix DateTime for use without Sub::Util #131
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New
$one_param_validator
forDateTime->from_epoch
constructor had a non-optional name, which caused an exception to be raised ifSub::Util
was not present, such as on old perls prior to 2015 whenSub::Util
was added to core. All of the other named validators usename_is_optional => 1
to avoid this issue, so it looks like an oversight rather than a deliberate decision to require the name.