fix problem with Senate api

Included LARR paper

add jsonlite library

add entry for the new api to list authors

add rlang and jsonlite do list of dependencies

add function to obtain list of authors of a certain issue

change maintainer

change Camara URL in DESCRIPTION

v2.2, bugfixes for API changes

Add cham_votes_year function

create new sen_votes_year function to get data from 2018 and 2019 and change old sen_votes_year function to sen_votes_year_file

fix issue related to bills without rollcall_id

fix a mistakes related to roll calls without votes inside request object

Update README.md

change sen_commissions_positions()