Treat callback_query_id as string in spec helper

[rndev15]

Hey there,
I found this issue when I have TypedUpdate and callback_query.

In specs:

context 'callback query', :callback_query do
  let(:data) { 1 }

  it { should answer_callback_query 'response', show_alert: true }
end
I had the following error:

Failure/Error: it { should answer_callback_query 'response', show_alert: true }
       expected to make exactly 1 #<Telegram::Bot::ClientStub#...>.answerCallbackQuery requests, with [#<RSpec::Mocks::ArgumentMatchers::HashIncludingMatcher:... @expected={:show_alert=>true, :callback_query_id=>11, :text=>"response"}>], but made 0, and 1 with {:show_alert=>true, :callback_query_id=>"11", :text=>"response"}

spec helpers expecting callback_query_id as Integer, while app returns string.

This PR fixes it, but I can make additional changes (if needed)

Previously I made a PR to telegram-bot-types telegram-bot-rb/telegram-bot-types#7, but maintainer told me that while API expects String, we have to fix spec helpers, not types.

[printercu]

Thanks!