Use debug gem instead of pry (#234)

bin/console

@@ -4,5 +4,8 @@
 require 'bundler/setup'
 require 'telegram/bot'
 
-require 'pry'
-Pry.start
+require 'irb'
+require 'irb/completion'
+
+IRB.setup(nil)
+IRB::Irb.new.run(IRB.conf)