Update spree_sale_pricing.gemspec
Update spree_sale_pricing.gemspec

spree core version
redglory/spree_sale_prices,deseretbook/spree_sale_pricing,Neschur/spree-sale-pricing,deseretbook/spree_sale_pricing,Neschur/spree-sale-pricing,redglory/spree_sale_prices,fdelrio89/spree_sale_pricing,renuo/spree_sale_prices,Neschur/spree-sale-pricing,redglory/spree_sale_prices,renuo/spree_sale_prices