wikkitidy 0.1.14

• Added failure_mode parameter to get_history_count() and page_vector_functions
• Changed behaviour of get_rest_resource() so that the number of output rows is guaranteed to be the same as the number of input rows. Now if a request fails, a new column is added to the output error_code, with the http response code.
• Removed get_page_related() due to deprecation of API endpoint
• wikkitidy now depends on R 4.1, due to use of the native pipe
• Removed use of "redirect" parameter in wikimedia_rest_request tests, due to deprecation