Added Danish unit test for CarbonIntervalForHumansTest.php
Added Danish unit test for CarbonIntervalForHumansTest.php

serima/Carbon,Klinche/Carbon,lndj/Carbon,lucasmichot/Carbon,briannesbitt/Carbon,EazyServer/Carbon,damnedest/Carbon,nicholas-eden/Carbon,dlepaux/Carbon,kylekatarnls/Carbon,m4nt4s/Carbon,hinternet/Carbon