Log Message:
enchant2: update to 2.3.1.

2.3.1 (August 9, 2021)
----------------------

Hunspell: fix enchant_dict_get_extra_word_characters API so it always
returns UTF-8. Use the same limit on word length as Hunspell uses (it is
different for UTF-8). Drop support for Hunspell 1.4.

Ignore hidden files when loading provider modules.

In a slight update to a change introduced in 2.3.0, in the default
enchant.ordering file, do not prefer aspell for all “en” locales, only for
the specific “en” locales that it supports.