Added stub for next version in CHANGELOG
Added stub for next version in CHANGELOG

Maks3w/zend-diactoros,Ocramius/zend-diactoros,mtymek/zend-diactoros,deepfreeze/zend-diactoros,jguittard/zend-diactoros,localheinz/zend-diactoros,mnapoli/zend-diactoros