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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  $ cat >> $HGRCPATH << EOF

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  > [extensions]

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  > absorb=

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  > drawdag=$TESTDIR/drawdag.py

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  > EOF

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  $ hg init

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  $ hg debugdrawdag <<'EOS'

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  > C

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  > |

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  > B

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  > |

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  > A

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  > EOS

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  $ hg phase -r A --public -q

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  $ hg phase -r C --secret --force -q

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  $ hg update C -q

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  $ printf B1 > B

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  $ hg absorb -aq

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  $ hg log -G -T '{desc} {phase}'

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  @  C secret

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  |

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  o  B draft

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  |

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  o  A public

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