This is mostly a bug fix release.
- Issue #506 uncovered a potentially serious error where Unicode strings may not get a NULL terminator when being converted.
- Issue #504 was a double decref in the error return path of executemany. Thanks to @v-chojas for this fix.
Additionally, thanks @gordthompson for both adding get_output_converter (#496) and for updating the SQL Server tests to properly bypass issues not supported with the FreeTDS driver.
Due to #506, I recommend upgrading from 4.0.25 where the issue was introduced.