Add support for Alchemy 8.0

Author: tvdeyen

alchemy-devise.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.files = Dir["{app,config,db,lib}/**/*", "LICENSE", "CHANGELOG.md", "README.md"]
 
-  s.add_dependency "alchemy_cms", ["~> 7.0"]
+  s.add_dependency "alchemy_cms", [">= 8.0", "< 9.0"]
   s.add_dependency "devise", ["~> 4.9"]
 
   s.add_development_dependency "capybara"

app/models/alchemy/user.rb

@@ -35,7 +35,7 @@ class User < ActiveRecord::Base
     scope :logged_in, -> { where("last_request_at > ?", logged_in_timeout.seconds.ago) }
     scope :logged_out, -> { where("last_request_at is NULL or last_request_at <= ?", logged_in_timeout.seconds.ago) }
 
-    ROLES = Config.get(:user_roles)
+    ROLES = Alchemy.config.user_roles
 
     class << self
       def ransackable_attributes(_auth_object = nil)