Delegate each_response_cookies to cookies

Fix rubocop
Add CHANGELOG

Author: ericproulx

CHANGELOG.md

@@ -7,6 +7,7 @@
 * [#2537](https://github.com/ruby-grape/grape/pull/2537): Use activesupport `try` pattern - [@ericproulx](https://github.com/ericproulx).
 * [#2536](https://github.com/ruby-grape/grape/pull/2536): Update normalize_path like Rails - [@ericproulx](https://github.com/ericproulx).
 * [#2540](https://github.com/ruby-grape/grape/pull/2540): Introduce Params builder with symbolized short name - [@ericproulx](https://github.com/ericproulx).
+* [#2549](https://github.com/ruby-grape/grape/pull/2549): Delegate cookies management to Grape::Request - [@ericproulx](https://github.com/ericproulx).
 * Your contribution here.
 
 #### Fixes

lib/grape/endpoint.rb

@@ -13,7 +13,8 @@ class Endpoint
     attr_accessor :block, :source, :options
     attr_reader :env, :request
 
-    def_delegators :request, :params, :headers, :cookies
+    def_delegators :request, :params, :headers
+    def_delegators :cookies, :each_response_cookies
 
     class << self
       def new(...)
@@ -329,7 +330,7 @@ def run_filters(filters, type = :other)
       extend post_extension if post_extension
     end
 
-    %i(befores before_validations after_validations afters finallies).each do |method|
+    %i[befores before_validations after_validations afters finallies].each do |method|
       define_method method do
         namespace_stackable(method)
       end
@@ -402,7 +403,7 @@ def build_helpers
     end
 
     def build_response_cookies
-      cookies.each_response_cookies do |name, value|
+      each_response_cookies do |name, value|
         cookie_value = value.is_a?(Hash) ? value : { value: value }
         Rack::Utils.set_cookie_header! header, name, cookie_value
       end