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/rspec/integration/shared.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'active_support/json'
 require 'telegram/bot'
 require 'telegram/bot/rspec/message_helpers'
@@ -10,5 +12,5 @@ RSpec.shared_context 'telegram/bot/integration/shared' do
 
   let(:bot) { Telegram.bot }
   let(:clear_session?) { described_class.respond_to?(:session_store) }
-  before { described_class.session_store.try!(:clear) if clear_session? }
+  before { described_class.session_store&.clear if clear_session? }
 end