~xenrox/srht-patches.nvim

gitsendemail: Support patch series

Had a false negative, where a missing prefix is not correctly detected
if the patch is part of a series.
Look at Cc header as well
README: Update git send-email support
Highlight discouraged subject line as an error

The PATCH subject line should contain the repository name.
Add build with lint
Add configuration for selene lint
Improve completion

Now will only show items which match the already entered input.
Add address filter to auto_check

User can set email regexes so that the autocmd will only trigger if the
To header matches a regex.
Fix auto_check being called on non patch emails
Add autocmd to check if header is set

User will be asked once (on save) to update the patchset status. This
behaviour has to be enabled in the configuration via the setup function.
Change to ftplugin

Now the commands only get loaded for mail files.
Handle already existing header

In that case it will simply be deleted.
Add commands for REJECTED and NEEDS_REVISION
Add first version

Can only set APPLIED header.