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/tasks/telegram-bot.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :telegram do
   namespace :bot do
     desc 'Run poller. It broadcasts Rails.logger to STDOUT in dev like `rails s` do. ' \
@@ -6,14 +8,14 @@ namespace :telegram do
       ENV['BOT_POLLER_MODE'] = 'true'
       Rake::Task['environment'].invoke
       if ENV.fetch('LOG_TO_STDOUT') { Rails.env.development? }.present?
-        console = ActiveSupport::Logger.new(STDERR)
-        if ::Rails.logger.respond_to?(:broadcast_to)
-          ::Rails.logger.broadcast_to(console)
+        console = ActiveSupport::Logger.new($stderr)
+        if Rails.logger.respond_to?(:broadcast_to)
+          Rails.logger.broadcast_to(console)
         else
           Rails.logger.extend ActiveSupport::Logger.broadcast console
         end
       end
-      Telegram::Bot::UpdatesPoller.start(ENV['BOT'].try!(:to_sym) || :default)
+      Telegram::Bot::UpdatesPoller.start(ENV['BOT']&.to_sym || :default)
     end
 
     desc 'Set webhook urls for all bots'