[Maintenance] Lower Sylius\ThemeBundle to 1.5
[Maintenance] Lower Sylius\ThemeBundle to 1.5

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