Fix compatibility with Grape 2.3

Author: samsonjs

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-case version = ENV['GRAPE_VERSION'] || '~> 1.0.0'
+case version = ENV['GRAPE_VERSION'] || '~> 2.3.0'
 when 'HEAD'
   gem 'grape', github: 'intridea/grape'
 else
@@ -12,7 +12,7 @@ end
 group :test do
   gem 'rack-test'
   gem 'ruby-grape-danger', '~> 0.1.0', require: false
-  gem 'sequel', '~> 4.37', require: false
+  gem 'sequel', '~> 5.91', require: false
   gem 'sqlite3'
 end
 

grape-active_model_serializers.gemspec

@@ -16,6 +16,6 @@ Gem::Specification.new do |gem|
   gem.version       = Grape::ActiveModelSerializers::VERSION
   gem.licenses      = ['MIT']
 
-  gem.add_dependency 'grape', '>= 0.8.0'
+  gem.add_dependency 'grape', '>= 2.3.0'
   gem.add_dependency 'active_model_serializers', '>= 0.10.0'
 end

lib/grape-active_model_serializers/error_formatter.rb

@@ -1,8 +1,6 @@
 module Grape
   module ErrorFormatter
-    module ActiveModelSerializers
-      extend Base
-
+    class ActiveModelSerializers < Base
       class << self
         def call(message, backtrace, options = {}, env = nil, original_exception = nil)
           message = present(message, env) if respond_to?(:present)

lib/grape-active_model_serializers/formatter.rb

@@ -1,6 +1,6 @@
 module Grape
   module Formatter
-    module ActiveModelSerializers
+    class ActiveModelSerializers
       class << self
         def call(resource, env)
           options = build_options(resource, env)