Subject case rule is ignored

[grrinchas]

Hello,

I have found that overriding subject-case with [2, "always", "sentence-case"] no errors are reported.

For example,

git commit -m "EX-12: subject case" -- should throw error
git commit -m "EX-12: Subject case" -- should pass

Maybe we can add new rule for this? or fix ti?

Thanks.