Force to install elastic 5.4 on heroku
Force to install elastic 5.4 on heroku

By default elastic 6 will be install and this is not
supported by django-elasticsearch-dsl

maferelo/saleor,mociepka/saleor,maferelo/saleor,UITools/saleor,mociepka/saleor,UITools/saleor,UITools/saleor,maferelo/saleor,UITools/saleor,mociepka/saleor,UITools/saleor