Error when paginating with will_paginate and Meilisearch is disabled

[ellnix]

Inspired by #375 I decided to try and see if the same issue applies to will_paginate:

  1) Pagination with will_paginate does not crash when meilisearch is disabled
     Failure/Error:
       expect do
         Movie.search ''
       end.not_to raise_error
     
       expected no Exception, got #<TypeError: can't convert MeiliSearch::Rails::Nul
lObject into Integer> with backtrace:
         # ./lib/meilisearch/rails/pagination/will_paginate.rb:13:in `create'
         # ./lib/meilisearch/rails/pagination.rb:27:in `load_pagination!'
         # ./lib/meilisearch/rails/pagination.rb:16:in `create'
         # ./lib/meilisearch-rails.rb:721:in `ms_search'

😮‍💨