Libcoveweb

Fixed

- Switch to a fork of the rfc6266 package, that supports Python 3.8

Changed

- All text that might appear in cove-ocds is translated into Spanish https://github.com/open-contracting/cove-ocds/issues/144

Fixed

- Codelist csv link now points to working service. https://github.com/OpenDataServices/lib-cove-web/issues/74

Added

- Number of days before files expire is now configurable in settings.py https://github.com/open-contracting/cove-ocds/issues/142

Changed

- Make `html_error_msg` importable from its own file, and without Django settings needing to be configured (e.g. in lib-cove-bods).

Fixed

- Fix 'NoneType' object has no attribute 'format', due to validation error messages we don't override

Fixed

- Make tables fixed layout to avoid layout breaking on long unbroken text
- Fix `NameError` due to `e_instance` not being defined