For the full changelog, see https://github.com/lpsmith/postgresql-simple/blob/master/CHANGES.md

Version 0.5.2.0 (2016-05-25)

• Significantly improved the error reporting from Copy.putCopyData, thanks to Ben Gamari.

• Moved the test suite to use tasty, with a big thanks to Ben Gamari.

• Added FromField.optionalField, and updated the documentation of FromField.fromJSONField, as inspired by an email conversation with Ian Wagner.

• Updated all links in the haddocks to use https, and added a link to the documentation of connectPostgreSQL.

• Added a truncated changelog to the source distribution.