Add resolv-replace to see if errors caused by DNS issues

slack-pixiv.rb

@@ -3,6 +3,7 @@ require 'wolfram'
 require 'mechanize'
 require 'nokogiri'
 require 'cgi'
+require 'resolv-replace'
 require 'slack-pixiv/commands/illust'
 require 'slack-pixiv/commands/member'
 require 'slack-pixiv/app'