Add deprecated fallback at telegram/bot/rspec/integration

lib/telegram/bot/rspec/integration.rb

@@ -0,0 +1,10 @@
+require 'telegram/bot'
+Telegram::Bot.deprecation_0_15.warn(
+  "`require 'telegram/bot/rspec/integration'` is deprecated in favor of " \
+  "`require 'telegram/bot/rspec/integration/rails'`"
+)
+require 'telegram/bot/rspec/integration/rails'
+
+Telegram::Bot::RSpec.with_include_context do |config|
+  config.include_context 'telegram/bot/integration/rails', telegram_bot: true
+end

lib/telegram/bot/rspec/integration/rails.rb

@@ -24,6 +24,5 @@ RSpec.shared_context 'telegram/bot/integration/rails', type: :request do
 end
 
 Telegram::Bot::RSpec.with_include_context do |config|
-  config.include_context 'telegram/bot/integration/rails', :telegram_bot
   config.include_context 'telegram/bot/integration/rails', telegram_bot: :rails
 end