glyanno 0.4.0

Breaking changes

• return_best = TRUE now returns a vector with the same length as input (with NA for unmatched glycans) instead of a tibble with potentially fewer rows. Affected functions: enhance_comp(), comp_to_struc(), mz_to_comp(), enhance_struc().

Minor improvements and bug fixes

• comp_to_struc() now errors when concrete compositions are matched against a generic structure database, instead of silently returning empty results.
• db paramter cannot be of zero length now, in which case an error will be raised.