refactor: remove with json_pure with json

cf-uaac.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
 
   # dependencies
-  s.add_runtime_dependency 'cf-uaa-lib', '~> 4.0.6'
+  s.add_runtime_dependency 'cf-uaa-lib', '~> 4.0.7'
   s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'rspec', '~> 3.12'
   s.add_development_dependency 'simplecov', '~> 0.22.0'
@@ -42,6 +42,6 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'eventmachine', '~> 1.2'
   s.add_runtime_dependency 'launchy', '>= 2.5', '< 4.0'
   s.add_runtime_dependency 'em-http-request', '~> 1.1', '>= 1.1.2'
-  s.add_runtime_dependency 'json_pure', '~>2.7'
+  s.add_runtime_dependency 'json', '~>2.7'
   s.add_runtime_dependency 'rack', '~>3.0'
 end

lib/uaa/cli/base.rb

@@ -13,7 +13,7 @@
 
 require 'highline'
 require 'optparse'
-require 'json/pure'
+require 'json'
 require 'io/console'
 
 module CF; module UAA end end

lib/uaa/cli/curl.rb

@@ -15,7 +15,7 @@
 require 'rack'
 require 'net/http'
 require 'uaa/http'
-require 'json/pure'
+require 'json'
 
 module CF::UAA
   class CurlCli < CommonCli

lib/uaa/stub/server.rb

@@ -16,7 +16,7 @@
 require 'logger'
 require 'pp'
 require 'erb'
-require 'json/pure'
+require 'json'
 require 'rack'
 
 module Stub