Update release cycle for 1.8 and 1.9
Update release cycle for 1.8 and 1.9

kayue/Sylius,pjedrzejewski/Sylius,lchrusciel/Sylius,antonioperic/Sylius,loic425/Sylius,pamil/Sylius,antonioperic/Sylius,Sylius/Sylius,101medialab/Sylius,SyliusBot/Sylius,GSadee/Sylius,Arminek/Sylius,Zales0123/Sylius,kayue/Sylius,101medialab/Sylius,diimpp/Sylius,GSadee/Sylius,SyliusBot/Sylius,SyliusBot/Sylius,antonioperic/Sylius,loic425/Sylius,Zales0123/Sylius,lchrusciel/Sylius,pjedrzejewski/Sylius,Sylius/Sylius,pamil/Sylius,Arminek/Sylius,loic425/Sylius,diimpp/Sylius,diimpp/Sylius,lchrusciel/Sylius,Arminek/Sylius,pjedrzejewski/Sylius,101medialab/Sylius,Sylius/Sylius,pjedrzejewski/Sylius,GSadee/Sylius,kayue/Sylius,Zales0123/Sylius,pamil/Sylius