worrms v0.4.0

NEW FEATURES

• new functions wm_ranks_id() and wm_ranks_name() for getting taxonomic ranks by rank identifier or rank name (#20)
• new function wm_records_rank() for getting AphiaRecords for a given rank id (#20)

MINOR IMPROVEMENTS

• wm_synonyms() gains offset parameter to allow pagination (#20)
• tibble::as_data_frame() replaced with tibble::as_tibble()

DEPRECATED AND DEFUNCT

• wm_record_() is deprecated; wm_record() now handles 1 or more AphiaID's

BUG FIXES

• fix wm_children test that was failing on cran checks (#21)