packaging: update dulwich to drop the certifi dependency on Windows The presence of `certifi` causes the system certificate store to be ignored, which was reported as a bug against TortoiseHg[1]. It was only pulled in on Windows because of `dulwich`, which was copied from the old TortoiseHg install scripts, in order to support `hg-git`. This version of `dulwich` raises the minimum `urllib3` to a version (1.25) that does certificate verification by default, without the help of `certifi`[2]. We already bundle a newer version of `urllib3`. Note that `certifi` can still be imported from the user site directory, if installed there. But the installer no longer disables the system certificates by default. [1] https://foss.heptapod.net/mercurial/tortoisehg/thg/-/issues/5825 [2] https://github.com/jelmer/dulwich/issues/1025

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  $ rm -rf a

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  $ hg init a

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  $ cd a

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  $ echo a > a

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  $ hg ci -Am0

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  adding a

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  $ hg tag t1 # 1

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  $ hg tag --remove t1 # 2

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  $ hg co 1

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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

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  $ hg tag -f -r0 t1

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  $ hg tags

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  tip                                3:a49829c4fc11

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  t1                                 0:f7b1eb17ad24

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  $ cd ..