union-transform procedure

6.2

added union-transform routine

Bug fix in key/value generators

This release includes a fix to the key and value generators.

Port to YASOS

This release includes a refactoring to support a yasos-based object interface, including the operations defined by yasos-collections.

Port to CHICKEN 5

This release includes changes for compatibility with CHICKEN 5

Bug fix in list-values

This release fixes a bug in list-values

Added update method

Added method updated to the PersistentMap typeclass which allows merging values with the same key.