evanodell/hansard: v0.4.8

New all_data parameter in election_results() to return the number of votes cast for each party in each constituency.

New election_candidates() function, which returns the name of all candidates standing in an election.

New epetition_tibble() function, which returns a tibble with all epetitions submitted to parliament, subject to parameters. This function offers more flexibility for returning basic details about a group of epetitions than the existing epetition() function, which is designed to provide more detailed information on a single epetition.