imfweo 0.2.0

Breaking changes

Removed weo_get_latest_publication(). With the move of the WEO database to the IMF Data portal, each vintage sits behind an opaque per-vintage identifier, so the latest publication can no longer be detected from the IMF website. The known releases are now kept in a lookup table inside the package, whose newest entry is the default publication for weo_get(), weo_get_entities() and weo_get_series(). New releases become available after a package update — see the maintainer note at the top of R/weo_releases.R for how to add one.
Removed the check_latest argument of weo_list_publications(), which relied on the online check. The function now returns the known releases from the lookup table and no longer depends on the current date. Its end_year now defaults to the year of the most recent known publication.

Added support for the 2025 Fall and 2026 Spring publications, which are distributed as a single multi-sheet Excel workbook on the IMF Data portal instead of the two tab-delimited files used up to 2025 Spring. Country group codes of these releases are mapped back to their pre-portal codes (e.g. G001 to 001) using the crosswalk shipped in the workbook, so that entity IDs stay comparable across publications.

Fixed the download of the 2021 to 2023 publications. The IMF retired the .ashx URLs these vintages were served under; the same files are still available as .xls.
A download that answers with an error page under an HTTP 200 status is now reported as a failed download instead of being parsed as data.
Add support for all publications until 2025 Spring in weo_get().

Initial CRAN submission with weo_get(), weo_get_series(), weo_entities(), weo_latest_publication(), weo_list_publications()