Change offeres_to to offers_to for method naming

engines/dfc_provider/app/serializers/dfc_provider/offer_serializer.rb

@@ -6,7 +6,7 @@ module DfcProvider
   class OfferSerializer < ActiveModel::Serializer
     attribute :id, key: '@id'
     attribute :type, key: '@type'
-    attribute :offeres_to, key: 'dfc:offeres_to'
+    attribute :offers_to, key: 'dfc:offers_to'
     attribute :price, key: 'dfc:price'
     attribute :stock_limitation, key: 'dfc:stockLimitation'
 
@@ -18,7 +18,7 @@ module DfcProvider
       'dfc:Offer'
     end
 
-    def offeres_to
+    def offers_to
       {
         '@type' => '@id',
         '@id' => nil