comexr 0.2.0

Breaking Changes

comex_historical() no longer accepts metric_statistic, metric_freight, metric_insurance, or metric_cif parameters. The historical API endpoint only supports FOB and KG metrics.
month_detail default changed from FALSE to TRUE in all query functions.

Fixed bloc detail mapping: now correctly maps to economicBlock (API name).
Added missing detail mappings: heading, chapter (city endpoint), nbm (historical endpoint), economic_block (alias).
Fixed comex_metrics("general") returning 0 rows when the depends field contained NULL values.
Fixed comex_ncm_detail(), comex_nbm_detail(), and other detail functions returning empty lists instead of named lists.
Fixed comex_historical() endpoint path (added required trailing slash).
Fixed response_to_tibble() failing on responses containing NULL or nested list values in row fields.

SSL auto-fallback: the package now detects SSL certificate failures (common with the ICP-Brasil chain) and automatically retries without verification, issuing a one-time warning. Set options(comex.ssl_verifypeer = FALSE) to suppress.

Corrected comex_query_city() documentation: city endpoint uses heading, chapter, section — not hs4, hs2, hs6.
Corrected comex_historical() documentation: only country, state, and nbm details are available (not ncm or section).
Updated comex_filter_values() documentation with the actual filters that have value endpoints (6 for general, 7 for city, 2 for historical).
Renamed package from comex to comexr.

30 exported functions covering all ComexStat API endpoints.
General trade queries: comex_query(), comex_export(), comex_import().
City-level queries: comex_query_city().
Historical queries (1989-1996): comex_historical().
Metadata: comex_last_update(), comex_available_years(), comex_filters(), comex_filter_values(), comex_details(), comex_metrics().
Auxiliary tables for geography, products, and classifications.