Update rubopcop (#227)

* Update rubopcop [WIP]

* Further rubocop fixes

* Fix rubocop-rails cops

* Fix spec

* Disable rubocop suggestions

* Run rubocop in github actions rather than in codeclimate

lib/telegram/bot.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'telegram/bot/config_methods'
 
 module Telegram
@@ -12,15 +14,6 @@ module Telegram
     # Raised for valid telegram response with 404 status code.
     class NotFound < Error; end
 
-    module_function
-
-    def deprecation_0_16
-      @deprecation ||= begin
-        require 'active_support/deprecation'
-        ActiveSupport::Deprecation.new('0.16', 'Telegram::Bot')
-      end
-    end
-
     autoload :Async,              'telegram/bot/async'
     autoload :Client,             'telegram/bot/client'
     autoload :ClientStub,         'telegram/bot/client_stub'
@@ -30,6 +23,7 @@ module Telegram
     autoload :Tasks,              'telegram/bot/tasks'
     autoload :UpdatesController,  'telegram/bot/updates_controller'
     autoload :UpdatesPoller,      'telegram/bot/updates_poller'
+    autoload :VERSION,            'telegram/bot/version'
   end
 end