fix: enumerize with string store accessor keys

Ensures Enumerize is agnostic to whether the key to a store accessor is a
string or symbol

lib/enumerize/activerecord.rb

@@ -76,7 +76,7 @@ def reload(options = nil)
           begin
             # Checks first if the enumerized attribute is in ActiveRecord::Store
             store_attr, _ = reloaded.class.stored_attributes.detect do |_store_attr, keys|
-              keys.include?(attr.name)
+              keys.map(&:to_sym).include?(attr.name.to_sym)
             end
 
             if store_attr.present?

test/activerecord_test.rb

@@ -108,10 +108,11 @@ class User < ActiveRecord::Base
   extend Enumerize
   include RoleEnum
 
-  store :settings, accessors: [:language]
+  store :settings, accessors: [:language, 'country_code']
 
   enumerize :sex, :in => [:male, :female], scope: :shallow
   enumerize :language, :in => [:en, :jp]
+  enumerize :country_code, :in => [:us, :ca]
 
   serialize :interests, type: Array
   enumerize :interests, :in => [:music, :sports, :dancing, :programming], :multiple => true
@@ -211,6 +212,15 @@ class ActiveRecordTest < Minitest::Spec
     expect(user.origin).must_be_nil
   end
 
+  it 'saves stored attribute value for store accessor with string key' do
+    User.delete_all
+    user = User.new
+    user.country_code = :us
+    user.save!
+    user.reload
+    expect(user.country_code).must_equal 'us'
+  end
+
   it 'has default value' do
     expect(User.new.role).must_equal 'user'
     expect(User.new.attributes['role']).must_equal 'user'