checkInputs used to be added to nativeBuildInputs. Now we have
nativeCheckInputs to do that instead. Doing this treewide change allows
to keep hashes identical to before the introduction of
nativeCheckInputs.
This fixes some two-digit year rounding bugs that started triggering
because 2020 is closer to 2070 than 1970. Apparently two digits years
are still a thing.
highlight's Perl bindings are currently disabled on Darwin, but I
didn't make the dependency here conditional so that if that is ever
fixed, this function won't need to be updated. p-i is smart enough to
disable the test for highlight if it can't find the Perl module.
