Bump dulwich from 0.19.16 to 0.20.5

[dependabot-preview]

Bumps dulwich from 0.19.16 to 0.20.5.

Changelog

Sourced from dulwich's changelog.

0.20.5 2020-06-22

• Print a clearer exception when setup.py is executed on Python < 3.5. (Jelmer Vernooij, #783)

• Send an empty pack to clients if they requested objects, even if they already have those objects. Thanks to Martijn Pieters for the detailed bug report. (Jelmer Vernooij, #781)

• porcelain.pull: Don't ask for objects that we already have. (Jelmer Vernooij, #782)

• Add LCA implementation. (Kevin Hendricks)

• Add functionality for finding the merge base. (Kevin Hendricks)

• Check for diverged branches during push. (Jelmer Vernooij, #494)

• Check for fast-forward during pull. (Jelmer Vernooij, #666)

• Return a SendPackResult object from GitClient.send_pack(). (Jelmer Vernooij)

• GitClient.send_pack now sets the ref_status attribute on its return value to a dictionary mapping ref names to error messages. Previously, it raised UpdateRefsError if any of the refs failed to update. (Jelmer Vernooij, #780)

• Add a porcelain.Error object that most errors in porcelain derive from. (Jelmer Vernooij)

• Fix argument parsing in dulwich command-line app. (Jelmer Vernooij, #784)

0.20.3 2020-06-14

• Add support for remembering remote refs after push/pull. (Jelmer Vernooij, #752)

• Support passing tree and output encoding to dulwich.patch.unified_diff. (Jelmer Vernooij, #763)

• Fix pushing of new refs over HTTP(S) when there are no new objects to be sent. (Jelmer Vernooij, #739)

• Raise new error HTTPUnauthorized when the server sends back a 401. The client can then retry with credentials.

Commits

• ba79362 Release 0.20.5
• 68bbad1 Release 0.20.4
• f572d9e Run setup.py with python3.
• 160656c Fix argument parsing in dulwich command-line app. Fixes #784
• b5629a2 Fix style.
• 1d3df10 Add dulwich.porcelain.Error.
• e306de8 Avoid UpdateRefsError.
• d12011d Add .ref_status attribute to SendPackResult rather than raise UpdateRefsError.
• 0d01a8a Update NEWS; don't ask for objects that we already have. Fixes #782
• 27dbb6f Return a SendPackResult object from GitClient.send_pack.
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #4.