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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  $ hg init repo

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  $ cd repo

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  $ touch foo

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  $ hg ci -Am 'add foo'

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  adding foo

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  $ hg up -C null

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

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this should be stored as a delta against rev 0

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  $ echo foo bar baz > foo

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  $ hg ci -Am 'add foo again'

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  adding foo

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  created new head

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  $ hg debugindex foo

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     rev linkrev       nodeid    p1-nodeid    p2-nodeid

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       0       0 b80de5d13875 000000000000 000000000000

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       1       1 0376abec49b8 000000000000 000000000000

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  $ cd ..