.editorconfig

packaging: update the certifi dependency

Not sure if this helps with recent certificate issues[1], but we might as well
keep this modern.

Note that certifi no longer claims py2 support, and there's a PR to add it back
in[2].  Py2 support was dropped in 2020.04.05.2 (which predates what's being
updated here).  None of the *.py files have changed since the 2020.6.20 release,
and I was able to call `certifi.where()` in both a virtualenv and with
`hg debugshell` from an MSI install with this version, so we shouldn't be any
worse off than before.

[1] https://foss.heptapod.net/mercurial/tortoisehg/thg/-/issues/5745
[2] https://github.com/certifi/python-certifi/pull/154

Differential Revision: https://phab.mercurial-scm.org/D11609

# See http://EditorConfig.org for the specification

root = true

[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
end_of_line = lf

[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
end_of_line = lf

[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false
end_of_line = lf