Bump dulwich from 0.19.15 to 0.20.1

[dependabot-preview[bot]]

Bumps dulwich from 0.19.15 to 0.20.1.

Changelog

Sourced from dulwich's changelog.

0.20.1 2020-06-01

• Publish binary wheels for: Windows, Linux, Mac OS X. (Jelmer Vernooij, #711, #710, #629)

0.20.0 2020-06-01

• Drop support for Python 2. (Jelmer Vernooij)

• Only return files from the loose store that look like git objects. (Nicolas Dandrimont)

• Ignore agent= capability if sent by client. (Jelmer Vernooij)

• Don't break when encountering block devices. (Jelmer Vernooij)

• Decode URL paths in HttpGitClient using utf-8 rather than file system encoding. (Manuel Jacob)

• Fix pushing from a shallow clone. (Brecht Machiels, #705)

0.19.16 2020-04-17

• Don't send "deepen None" to server if graph walker supports shallow. (Jelmer Vernooij, #747)

• Support tweaking the compression level for loose objects through the "core.looseCompression" and "core.compression" settings. (Jelmer Vernooij)

• Support tweaking the compression level for pack objects through the "core.packCompression" and "core.compression" settings. (Jelmer Vernooij)

• Add a "dulwich.contrib.diffstat" module. (Kevin Hendricks)

Commits

• 8000e83 Only upload manylinux wheels on Linux.
• 9590b30 Remove travis configuration, replaced by github actions.
• 227d897 Release 0.20.1
• 6b77a64 Enable automatic publish.
• ebc04a4 Skip building on python 3.5 on windows due to path encoding issues.
• 4da7031 Fix os name typo.
• 32c037b Update NEWS, add builds or more python versions.
• 52bbabf Attempt to fix pythonpublish on Linux.
• 89bd716 Release 0.20.0
• 7c92497 Upload new packages for all tags.
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #59.