21.1.0

These release notes are automatically extracted from the full changelog.

Features

• filter: Add --empty-output-reporting={error,warn,silent} option to allow filter to produce empty outputs without raising an error. The default behavior is still to raise an error when filter produces an empty output, so users will have to explicitly pass the "warn" or "silent" value to bypass the error. #1175 (@joverlee521)

Bug fixes

• translate: Fix error handling when features cannot be read from reference sequence file. #1168 (@victorlin)
• translate: Remove an unnecessary check which allowed for inaccurate error messages to be shown. #1169 (@victorlin)
• frequencies: Previously, monthly pivot points calculated from the end of a month may have been shifted by 1-3 days. This is now fixed. #1150 (@victorlin)
• Update development status on PyPI from "3 - Alpha" to "5 - Production/Stable". This should have been done since the beginning of this changelog, but now it is official. #1160 (@corneliusroemer)